The Classic aqua jogger belt, with its patented design, is thr original model, a great belt for both men and women. The Classic highlights AquaJogger's original technology of increased lumbar buoyancy, allowing for a great abdominal workout. The AquaJogger buoyancy belt comfortably suspends the body at shoulder level in deep water. While breathing naturally above water, a person can move freely underwater and perform a multitude of workouts. With its contoured design, the AquaJogger promotes correct posture, supports the lower back, and tones abdominal muscles. Enjoy almost any activity in the water that you traditionally do on land, including running, cross country skiing, and aerobics.