When sourcing sports accessories like resistance bands, yoga mats, or protective gear, material integrity is paramount. For elastic products, prioritize 100% natural latex over TPE for superior durability and snap-back consistency. For wearable accessories, ensure fabrics use moisture-wicking synthetic blends (like nylon-spandex) with a GSM (Grams per Square Meter) of at least 250 to prevent transparency and ensure compression support. Always verify that materials are BPA-free and non-toxic, especially for items in direct skin contact.