Sliding into bone chilling water before dawn is made tolerable with a swim cap engineered specifically to battle the elements. TYRs Neoprene Swim Cap will keep you comfortable and sleek when swimming in the open water. Featuring an insulated neoprene construction complete with chinstrap, this piece of equipment retains body heat and helps prevent hypothermia. The cap features 3mm Yamamoto rubber construction for stability, grip, and ear protection. This cap comes in two sizes: small (head sizes up to 22) and large (head sizes 22+).