What Is the Purpose of Seam Slippage Testing in Sportswear?

Seam slippage testing assesses whether yarns move apart near a sewn seam under a defined load; it is different from measuring stitch breakage or overall seam strength.

Its relevance depends on the fabric construction, and a method intended for certain woven fabrics may not suit a stretch knit. Ask the laboratory to select a method appropriate to the actual material. For activewear, also evaluate seam extension, recovery, and failure under the intended garment movement.