What Should Be Checked During a Jacket Zipper Function Test?

Zipper tests check opening, closing, alignment, retention, endpoints, and skin-contact protection.

Closures and edge details need compatible materials, stable attachment, and controlled dimensions. Check operation, symmetry, skin comfort, and dimensional change after care; small differences in feed tension or stabilization can create visible distortion even when the individual component meets its own purchasing specification. Repeat checks after relevant care exposure.