Flammability of Clothing Textiles

Part 1610 applies to wearing apparel and textiles intended for clothing, subject to defined exceptions for certain hats, gloves, footwear and interlinings. Some infant and tight-fitting sleepwear follows this standard, while other children’s sleepwear follows parts 1615 or 1616. Identify the garment’s use and the exposed material surfaces before choosing a test or claiming an exception.

The standard distinguishes normal flammability, intermediate flammability for raised-surface fabrics, and dangerously rapid or intense burning. Class 3 materials are not permitted for wearing apparel. Plain and raised surfaces are evaluated differently, including the role of surface flash and base-fabric burning. A supplier’s statement that a fabric is flame resistant is not a substitute for the prescribed classification.

The method controls specimen preparation, conditioning, orientation and the burning evaluation. Refurbishing procedures can affect the result, so an unwashed sample and a sample evaluated after the required cleaning sequence are not interchangeable. Laboratory documentation should identify surface type, specimen direction, preparation, flame-spread observations and the classification basis, including whether the result concerns the supplied finish.

Certain plain-surface fabrics meeting the specified minimum weight and fabrics composed entirely of listed fibers can qualify for testing exemptions. These are defined provisions, not a blanket exemption for every synthetic blend or heavy-looking garment. Maintain weight, fiber-content and construction information. Treatments, blends and raised surfaces must be assessed against the actual wording of section 1610.1(d). A blend containing an unlisted fiber needs its own documented exemption analysis.

Covered general-use apparel can require a GCC; children’s products can require a CPC with applicable testing requirements and relief evaluated separately. Connect a test report or documented exemption to the finished product and production material. Changes in brushing, pile, finish or laundering behavior may matter even when the fiber percentage and garment style remain nominally unchanged.

FTC fiber, origin and care labeling obligations do not establish CPSC flammability compliance, and a flammability result does not substantiate those labels. Use part 1610 and the CPSC laboratory manual to define the technical evidence needed, then reconcile the care instructions with the tested construction. Avoid using an ordinary fabric classification as a claim that a garment provides protective clothing performance.