Water Gear’s Aqua Trim deep water jogging belt is designed to keep you afloat in the deep water while exercising. The sizing allows you to properly fit the individual with the correct amount of buoyancy. The belts can be attached together to provide a greater amount of buoyancy. The fully adjustable nylon belt securely fastens the Aqua Trim in place around your waist. The Aqua Trim can also be used to assist in floating you in a shallow water, thereby relieving unwanted stress on joints during a shallow water workout. The belt float can also be used as a buoyancy aid for beginning swimmers or handicapped individuals that need additional float support to fully utilize the benefits of aqua aerobics. The belt is made of soft to the touch, high density, and closed cell EVA foam that will not absorb water or chip. Three Sizes: Small (100-160 lbs), Medium (160-220 lbs) and Large (220+ lbs). Foam Dimensions: (Small: 22"L x 8"W x 1.5"H) (Medium: 29"L x 8"W x 1.5"H) (Large: 40"L x 8"W x 1.5"H)