The Contract Terms Every Waterproof Bag Buyer Should Insist On

Start from the signed sample, not from the drawing

The most common structural weakness in waterproof bag contract terms is that the specification is a drawing. Drawings are descriptions, and descriptions are arguable: a two-dimensional sheet cannot express hand feel, weld appearance, stiffness, the way a roll-top folds, or how much a seam tape edge shows. Every one of those becomes a disagreement the moment a lot arrives. The fix is to make a physical object the specification and the drawing subordinate to it, and to get that priority written into the purchase agreement clauses rather than left as an understanding.

In practice this means a signed reference sample: one unit, from the actual production tooling or the actual cutting die, signed and dated by both sides, with photographs from agreed angles, retained by each party, and named in the contract as controlling in the event of conflict with any drawing. Two copies minimum, ideally three, because samples get used, loaned and lost exactly when they are needed.

The clause should say which document wins. A sentence such as "in the event of any conflict between the technical drawing and the signed reference sample, the signed reference sample governs" costs nothing to include and ends a category of argument before it starts. Without it, the supplier will point at the drawing’s tolerances and you will point at the bag, and the person deciding will be whoever holds the goods.

This is also where the sampling stage earns its keep. The approved prototype produced during custom waterproof bag sampling is the natural candidate for the reference sample, provided it was made with production tooling rather than by hand. A hand-made prototype signed as the reference is a trap: production cannot reproduce it, and the contract now requires the impossible.

The specification clause: tolerances, revision state and change control

The specification clause does three jobs: it names the materials, it sets tolerances, and it fixes the revision state. Most contracts do the first and skip the other two, which is why "we changed the laminate supplier" arrives as a surprise three months into a programme.

Tolerances deserve particular care in this category. Dimensional tolerances on a sewn bag are straightforward; tolerances on a weld are not, because weld width, bond strength and appearance are related but separate properties. Specify what you actually care about — usually minimum bond strength in newtons plus an appearance range — rather than inheriting a generic tolerance table that does not describe the thing that fails.

And write the change trigger as an obligation with a consequence: notice in writing, your written approval, and a stated remedy if a change is made without it. A clause that says changes require approval but says nothing about what happens if they happen anyway is a request, not a term.

Quality clauses: AQL, critical defects and who holds the judgement

A quality clause that says "goods must be of good quality" is unenforceable in every practical sense, because both sides will sincerely believe they have met it. Replace it with three things: a named standard, a named defect classification, and a named decision-maker.

The standard is an acceptance sampling plan — usually an AQL-based one, with inspection level and the acceptance and rejection numbers for critical, major and minor defects stated rather than implied. The classification is a defect dictionary: named defects with their class, limit and judging method, attached to the contract. And the decision-maker is a person or a body: your inspector, a named third-party inspection company, or a joint re-inspection procedure when the two disagree.

Two category-specific points belong here and are routinely omitted. First, waterproof function must be a critical defect with a zero acceptance number, tested by a stated method at a stated sample size — not folded into the general cosmetic plan. The numbers are worked through in our AQL sampling guide. Second, the critical list must include load-bearing attachment failure, because a strap that separates is not a warranty claim, it is a safety incident.

Finally, decide the tie-break before you need it. A joint re-inspection clause — both sides inspect together within a stated number of days, with the cost falling to the party whose result is contradicted — resolves most disputes cheaply. Without it, the party holding the goods holds the leverage, and disagreements turn into delays.

Inspection rights and the right to reject: where, when and at whose cost

Inspection rights and rejection rights are separate and both need stating. Inspection is the right to look; rejection is the right to say no and what follows from it. Suppliers routinely accept the first and quietly resist the second, because the second is the one with money attached.

• Right to inspect during production, not only before shipment — including access to the line and to process records.
• Right to appoint a named third-party inspector at your cost, with the supplier obliged to provide access and cartons.
• Right to reject a lot on critical defects regardless of the overall AQL result, with zero acceptance applied.
• Defined remedy on rejection: rework at supplier cost, replacement within a stated number of days, or refund.
• Defined deadline for you to reject, so the right does not linger indefinitely and become a commercial weapon.
• Allocation of inspection and re-inspection cost depending on outcome, which discourages both frivolous rejection and careless supply.

The deadline cuts both ways and should be deliberate. Too short and you cannot inspect properly; too long and the supplier cannot plan. A period measured from the date you receive the inspection report, rather than from shipment, is the fairer construction and the easier one to administer.

Also state what happens to rejected goods. Rework at the supplier’s cost sounds generous until you discover the rework is a cosmetic repair to a structural defect. Say instead whether rejected goods may be reworked at all, and if so whether reworked lots are subject to tightened inspection — the switching rules described in our complete inspection guide exist precisely for that situation.

Delivery dates, delay damages and the force majeure carve-out

A delivery clause that names a month is not a delivery clause. Name a date, define what delivery means — goods ready for collection, goods loaded, or goods on board depending on the Incoterm — and attach a consequence to missing it. Without a consequence, a late delivery is a preference the supplier will exercise whenever a larger customer needs the line.

Then read the force majeure clause carefully, because it is where delay damages go to die. A well-drafted clause covers genuine events outside either party’s control and requires notice, evidence and mitigation. A badly drafted one covers "labour shortage", "material shortage", "power restriction" and "government policy" — which in a manufacturing context are ordinary business risks rather than force majeure, and which collectively swallow the entire delay regime.

Insist on three limits: force majeure does not excuse delays caused by the supplier’s own subcontractors or material suppliers; it requires written notice within a stated number of days with supporting evidence; and if it continues beyond a stated period, either party may terminate. Those three convert an escape hatch back into a clause with edges. The production calendar itself is laid out in our lead times guide, which is the basis for setting a realistic date in the first place.

Price, currency and the reopening trigger

Price clauses fail in two directions: they are either too rigid to survive an eighteen-month programme or too loose to mean anything. The usable construction fixes the price for a defined period or a defined quantity, and then states precisely what may reopen it and by how much.

Name the currency, the Incoterm and what is included — tooling amortisation, packaging, testing, marking. Then set a reopening trigger tied to something measurable: a named raw material index moving beyond a stated percentage, or a currency moving beyond a stated band, with the adjustment formula written down rather than negotiated later. A clause that says "price may be adjusted by mutual agreement" is not a clause; it is an agreement to have a conversation you will lose.

Quantity bands belong here too. If your programme will scale, fix prices at several bands now — 500, 1,500, 5,000 — rather than promising to renegotiate later, because the leverage you have before the first order is the most leverage you will ever have. The cost structure behind those bands is broken down in our cost breakdown.

Finally, address what happens to price when you change the specification. That belongs in change control, but the commercial half belongs here: a standing rule that a specification change reopens price and lead time automatically prevents the slow drift where six small improvements arrive with six small invoices nobody approved.

Payment milestones that can actually be verified

Payment terms are covered in detail elsewhere, but the contract-side point is narrower and worth stating: every payment milestone must be tied to an event you can independently verify, not to a date on a calendar or a promise from a salesperson. "Fifty per cent before production" is unverifiable and therefore unenforceable in practice; "fifty per cent on written confirmation that the approved sample has been produced and test evidence attached" is verifiable.

Good milestones in this category are: signature, approved reference sample, completion of bulk production with a passed inspection report, and shipment against a transport document. Each has a document attached to it that either exists or does not, which is what makes the clause workable when relations sour.

State the currency of payment, who bears bank charges — this is a real and recurring source of friction, typically twenty to sixty dollars per transfer in intermediary fees — and what happens if a payment is late. And keep the final payment genuinely final: a balance payable after you have received and inspected the goods is the single most effective quality lever in the whole agreement, because it aligns the supplier’s cash interest with your quality interest.

The mechanics of each method — deposit levels, letters of credit, documentary collection and how each affects your cash peak — are worked through in our payment terms guide, and the Incoterm that sits underneath the price is explained in the international shipping logistics guide.

Tooling and mould ownership: the clause that decides whether you can leave

If your programme uses custom cutting dies, welding electrodes, injection tools or bespoke hardware, the tooling clause is the most consequential commercial term in the contract after price — because it determines whether you have a supplier or a hostage. Tooling you do not own cannot be moved, and tooling that cannot be moved means every future price negotiation happens with the other party holding your assets.

Insist on four things. Ownership: the tools are yours, in writing, and the supplier acknowledges it. Marking: each tool carries your reference and is photographed in the supplier’s tool register. Release: on written request, or on termination for any reason, the tools are released to you or your nominated carrier within a stated number of days, with no set-off and no retention for disputed sums. And exclusivity of use: your tooling is not used for another customer’s product without written consent.

That last point surprises people. A factory that owns or holds your welding electrode will, absent a clause, happily run another customer’s bag on it at three in the morning, and there is no realistic way for you to detect it. If your design is distinctive, an exclusivity-of-use provision is worth more than a confidentiality clause.

The economics of tooling — what each tool type costs, how amortisation is loaded into unit price, tool life and maintenance responsibility, and the practical sequence for moving tools to another supplier — are covered in full in our tooling and mould costs guide. Read it before you sign anything that says "tooling free".

Confidentiality and IP: scope, duration and survival

A confidentiality clause is standard and almost always too narrow. Three fixes. Scope should cover not only documents you mark confidential but the existence of the relationship, the designs, the tooling, the material specification, and any process information you disclosed — including things disclosed orally or during a factory visit. Duration should extend beyond the commercial relationship, typically three to five years after termination for design information and indefinitely for trade secrets.

Survival is the clause people forget: state expressly that confidentiality, IP and tooling obligations survive termination of the agreement, however terminated. Without a survival clause, a supplier who terminates can argue that the obligations ended with the contract, which is precisely when they matter most.

And separate ownership from confidentiality. Confidentiality stops disclosure; it does not assign ownership. If you commissioned a design, state who owns it and whether the supplier may use the underlying construction, the pattern or the artwork for anyone else. Generic "buyer owns all IP" language is less useful than a specific list: artwork, pattern, tooling, mould, technical specification, and any improvements made during production.

The enforceability question — whether the clause is worth anything in the relevant jurisdiction, which entity should sign it, and why an NDA alone is close to useless in this context — is dealt with in our IP protection guide. The general framework for international sales contracts, including how default rules fill gaps you leave, is published by UNCITRAL.

Subcontracting prohibition: the clause most often missing

This is the first of the three clauses buyers most often leave out, and it is the one that quietly invalidates everything else in the agreement. Every clause you negotiated — quality, process control, materials, labour standards — was negotiated with a factory. If that factory subcontracts part of the work to a workshop you have never seen and are not in contract with, those clauses describe a process that is not the one making your bags.

Subcontracting in this industry is normal and often benign: embroidery, printing, hardware plating and some welding operations are routinely outsourced, and a good factory manages its subcontractors better than its own second shift. The problem is not outsourcing, it is undisclosed outsourcing. So the clause should not be an absolute prohibition, which will be signed and then broken; it should be a consent and transparency regime.

The workable version: no subcontracting of any production process without prior written consent, except for a named list of permitted operations; the supplier remains fully liable for subcontracted work as if performed in house; you have the right to audit subcontractors on the same terms; and undisclosed subcontracting is a material breach with a stated remedy. That gives the supplier a legal way to do what they already do, and gives you the knowledge.

Enforce it cheaply: put the permitted subcontractor list in the contract as a schedule, ask for it to be updated annually, and check it against what you see. Our supplier audit checklist includes the specific questions that reveal undisclosed outsourcing during a floor walk — mismatched output records, work leaving the building and returning finished, and stations that show no input material.

Change control: the second clause most often missing

Change control is the second of the three, and it is the mechanism that makes the specification clause live. Without it, the specification is true on the day of signature and progressively less true afterwards, because manufacturing reality generates changes constantly: a material is discontinued, a die wears, a machine is replaced, an operator finds a faster sequence. Each change is individually reasonable and collectively they produce a different product.

A change control clause needs four parts. Definition: what counts as a change — material, sub-supplier, process, tooling, location, or anything affecting fit, function or appearance. Notice: written notice before implementation, with a stated minimum lead time. Approval: your written approval, deemed given only after a stated period if you do not respond, so the supplier is not held hostage to your inbox. And documentation: the change is recorded against the drawing revision and, where it affects appearance or function, a new reference sample is signed.

The commercial half matters as much. A change must reopen price and lead time if it affects them, and a change made without approval carries a stated consequence — rejection of the affected lots, or a price adjustment, or both. This is the clause that stops the six-small-improvements drift, where each one arrives with a small invoice and none arrives with a decision.

It also protects the supplier, and saying so helps it get signed. A factory that wants to switch a laminate because the original has been discontinued has a legitimate problem; change control gives it a documented route to a decision instead of a gamble on whether you will notice. Framed that way, it is usually accepted without much resistance.

After termination: inventory, tooling and orders in flight

The third and most overlooked clause. Contracts are written by people imagining a successful relationship, so they describe what happens while it works and say nothing about what happens when it stops. Then the relationship stops — because of quality, because of price, because someone was acquired — and two questions turn out to be unanswered: who owns the material bought for your orders, and what happens to the goods already made.

Two drafting points make this clause work. First, distinguish a confirmed order from a forecast in writing and define what a confirmed order is — a purchase order you issued and the supplier accepted in writing is the clean construction. Forecasts create expectations, not obligations, and saying so protects both sides.

Second, state the transfer mechanics for material: the supplier provides evidence of purchase, you pay the documented cost, and the material moves to you or to your new supplier. Without a mechanism, "you own it" is a principle that cannot be executed, and the material sits in their store while you buy it again somewhere else.

Governing law, language and dispute resolution you can actually use

The last clause is the one that determines whether all the others are worth anything. A perfectly drafted contract governed by a law you cannot practically invoke, in a forum you cannot reach, is a document rather than a remedy. This is not a reason to be adversarial; it is a reason to be realistic about where enforcement would actually happen.

Three decisions. Governing law: pick one, and understand that if your counterparty’s assets and operations are in one jurisdiction, a judgment elsewhere may need to be recognised there before it bites. Forum: litigation or arbitration, named, with the seat and the rules stated. Language: if two language versions exist, state which governs, because "both equally authentic" produces an argument about translation the first time it matters.

Arbitration is commonly chosen for cross-border supply contracts precisely because awards are more portable than judgments under the New York Convention, and because it is private. For smaller programmes the cost can outweigh the benefit, so scale the mechanism to the relationship: a named arbitration institution and a simplified procedure for disputes below a threshold is a sensible construction for most buyers in this category.

Then add the clause that resolves most disputes without any forum at all: a written escalation procedure — quality manager to quality manager, then commercial leads, then executives, each with a stated response time — before either side may commence proceedings. It costs nothing and it settles the great majority of disagreements in days rather than months. If you want to see how a supplier responds to a full clause set before you commit volume, start with a first order: MOQ 500 pieces per style, sampling in 6–10 working days with test evidence attached, bulk in 35–50 days, FOB Xiamen, and the process from enquiry through to loaded container is documented in the production guide on our main site.

Frequently Asked Questions

Q1. Should the technical drawing or the signed sample control the specification?

The signed sample, and the contract should say so explicitly. A drawing cannot express hand feel, weld appearance or stiffness, so the physical reference made on production tooling should govern in the event of any conflict.

Q2. What is a reference sample and why does it need signing?

One unit produced with production tooling or cutting dies, signed and dated by both sides, photographed from agreed angles and retained by each party. Signing converts it from a courtesy into evidence.

Q3. Can a hand-made prototype be used as the reference sample?

No. Production cannot reproduce hand-work, so a hand-made sample signed as the reference makes the contract require the impossible. Always sign a sample made on production tooling.

Q4. How should waterproof function appear in the quality clause?

As a critical defect with a zero acceptance number, tested by a stated method at a stated sample size. It should never be folded into the general cosmetic AQL plan, where a small number of failures would be tolerated.

Q5. Who should decide whether a lot passed?

Name the decision-maker in the contract: your inspector, a named third-party company, or a joint re-inspection procedure. Include a tie-break with cost falling to the party whose result is contradicted.

Q6. What is the difference between inspection rights and rejection rights?

Inspection is the right to look, including during production. Rejection is the right to refuse a lot and trigger a remedy. Suppliers usually accept the first and resist the second, so state both.

Q7. May a supplier rework a rejected lot?

Only if the contract says so. State whether rework is permitted at all, whether it is at the supplier’s cost, and whether reworked lots are subject to tightened inspection.

Q8. How are delay damages usually structured?

A ladder rather than a flat rate: nil for the first week, around half a per cent per week for medium delay, one per cent plus a right to cancel for long delay, capped at five to ten per cent of order value so the clause is signable.

Q9. What should be excluded from a force majeure clause?

Ordinary business risks: labour shortage, material shortage, subcontractor failure and routine power restriction. Without those carve-outs the clause swallows the entire delay regime you just negotiated.

Q10. Why does tooling ownership matter more than tooling cost?

Because tooling you cannot move makes every future price negotiation one-sided. Ownership without a release clause and a marking requirement is ownership without possession, which is worthless in practice.

Q11. Should subcontracting be banned outright?

Usually not — it is normal for embroidery, printing and plating, and an absolute ban will be signed and broken. Require prior written consent, a named permitted list, full supplier liability and a right to audit.

Q12. What is a change control clause?

A mechanism requiring written notice and your approval before any change to material, sub-supplier, process, tooling or location, with documentation against the drawing revision and automatic reopening of price and lead time.

Q13. What happens to material bought for my orders if I terminate?

If the contract is silent, the supplier keeps or scraps it and bills you. Insist that you own material purchased against a confirmed order, with evidence of purchase required and a transfer mechanism.

Q14. How do I distinguish a confirmed order from a forecast?

Define it: a purchase order you issued and the supplier accepted in writing. State expressly that forecasts create no obligation, which protects both sides from arguments about expectations.

Q15. Why does confidentiality need a survival clause?

Because without one a supplier can argue the obligation ended with the contract, which is exactly when it matters. State that confidentiality, IP and tooling obligations survive termination however it occurs.

Q16. Should I choose litigation or arbitration?

Arbitration is common in cross-border supply contracts because awards are more portable and proceedings are private. Scale the mechanism to the order value and name the seat and rules.

Q17. What is an escalation clause and is it worth including?

A staged negotiation requirement — quality managers, then commercial leads, then executives, each with a response time — before proceedings may start. It costs nothing and settles most disputes in days.

People Also Ask

What clauses should a waterproof bag purchase contract include?

Specification by signed sample, tolerances, AQL and rejection rights, delay damages, price and currency, payment milestones, tooling ownership, IP, subcontracting consent, change control and termination.

Why should the signed sample control over the drawing?

Because drawings cannot express hand feel, weld appearance or stiffness. A physical reference turns subjective judgement into comparison.

What are the three most-missed clauses?

Change control, a subcontracting consent regime, and treatment of inventory and tooling after termination. All three are routinely absent from two-page order acknowledgements.

How much should delay damages be?

Commonly nil for the first week, around half a per cent per week thereafter rising to one per cent, capped at five to ten per cent of order value.

Who should own the tooling?

You, in writing, with marking, release-on-request within a stated period and exclusivity of use. Ownership without a release clause is not usable.

What law should govern a bag supply contract?

One you can practically enforce. Consider where the counterparty’s assets sit, choose arbitration for portability, and state which language version governs.