The WOW Rash Guard is not like other Lycra shirts.  The body of the shirt is a thick Polyester material designed for water, that gives you a layer of warmth.  Combined with the Nylon/Spandex sleeves and inset, you have warmth with NO constriction of movement. Ideal for all water sports above and below the water line. 5 popular sizes from 4-20 and 5 color combinations