Swim Costume Material: Nylon-Spandex (laycra) Laycra™ fabric is completely transformative from Nylon and Polyester. For sun bath, diving ,swimming etc Swim Shorts Material: Micro stretch fabric Our micro-stretch Shorts briefs are designed with a polyester/spandex fabric that stretches to move with you throughout the day. For sun bath ,diving, swimming etc Customize design with low MOQ