The Craft Cycling Arm Warmer is a lightweight and elastic arm warmer with a brushed inside and ergonomic shape. Thin, lightweight and elastic fabric allows for freedom of movement while cycling.ThermoCoolA(R) fabric is made of two high-tech polyesters and has a brushed inside offering superb thermoregulation in fair and cold conditionsElastic silicone grippers keep the arm warmers in placeErgonomically placed seams follow the moving bodyElastic seams in contrast colorAnatomically shaped reflective logo