Swimming Resistance Belt is wrapped with comfort neoprene and the belt can extends to 7 times longer The tether cord of Static Swimming Belt is hooked onto a belt around the swimmer's waist and is connected to any part of a pool from another side,such as a ladder, diving board and so on Swim Tether Belt is designed for in-ground and above-ground pools for outdoor and indoor pools Swim Training Belt can be as a nice gift for your families or friends Swim Resistance Tether with 1 for installation,which can be hung to any pole around the swim pool