Kokatat's Women's SunCore rashguard insulators provide UPF 30+ sun protection. These rashguard insulators are a lightweight, high-stretch construction of polyester and spandex that will absorb very little water and dry quickly. Paddling specific patterns and flat stitched seams prevent chafing.  Technical Specs 4-way stretch 92% polyester 8% spandex fabric UPF 30+ sun protection Next to skin layer Moves moisture away from skin to maximize comfort Dries quickly and absorbs little water Flat stitched seams prevent chafing Paddling specific patterns Product Care Wash it when it smells! Machine wash warm, hang to dry, no softeners, no bleach, do not iron.