Water Aerobics Jog Belt Flotation Aqua Jogger for Deep Water Exercise M/L Resilient closed cell foam dries quickly, won't absorb water, and resists chlorine damage Size M/L (fits waste sizes 32-40) Soft, flexible foam narrows at the waist for comfort and freedom of movement. Adjustable waist band features a quick-release, easy to operate buckle. Contoured design supports and strengthens the lower back.