arena Women's Mainsail Race Polyester Splice V-Line Back Swimsuit 53% Polyester, 47% PBT Thick strap v-line back styling with high cut. Front lined. Arena Italian fabric that is 100% chlorine resistant and has 50+ UV protection. Hand wash separately with mild soap in cold water after each use. Do not bleach. Do not tumble dry. Do not iron. Do not dry clean.