What “Dustproof” and “Warpproof” Bag Claims Imply

The Guides say it is unfair or deceptive to use “dustproof” unless the product is so constructed that, when closed, dust cannot enter it, and to use “warpproof” unless the product or part is such that it cannot warp.

What the text says

• Section 24.3(b): the term “dustproof” should be used to describe a product only if, when it is closed, dust cannot enter it.
• Section 24.3(c): the term “warpproof” should be used to describe all or part of a product only if it is such that it cannot warp.
• Section 24.3 also covers “waterproof”, “scuffproof” and “scratchproof”, and the “resistant” versions of the last two.
• The Guides apply to trunks, suitcases, travelling bags, cases, briefcases and similar articles.

What this means when you shop

1. Notice absolute words such as “proof”.
2. Ask how the product is built to back them up.
3. Look at the closure and the shape.
4. Compare with a product that makes a more modest claim.

A caution

A strong claim is not a reason to ignore the ordinary checks. Look at the bag, and check the seller’s return rules before you buy.

Why such claims matter

A hard case that is called dustproof may suit a camera or instruments better than a bag with a simple flap. If you need real protection from dust, ask for details of the seal or gasket, and think about an inner pouch. The claim itself tells you the seller’s intention, and the design tells you whether it can be achieved.

Where this answer stops

The Guides describe what claims should mean. They do not say whether a given product meets them. This article makes no claim about any brand and is not legal advice.