Speedo Women's Active Cropped Rashguard 80% Nylon, 20% Lycra Spandex Imported Lycra extra life spandex resists deterioration and maintains its shape 5-10 times longer than spandex Block the burn protects from harmful UV rays with tighter knit and woven fabrics that provide sun protection Raglan sleeves provide great mobility while paddling Eliminates chafing against your board