Generally, a pair of straight-legged pants and a long-sleeved tunic tie together so that the tunic will not float up when the swimmer is in the water. A hood, or in some cases a hood and a swim cap, accommodate the wearer's hair and cover the neck, fitting closely around the face. The hood may or may not be attached to the tunic. The suit resembles a full-length wetsuit with a built-in hood, but is somewhat looser. The suits are made of SPF50+ fabric, generally using a finely knit polyester swimsuit fabric rather than the heavier neoprene used for wetsuits.