The Aqua Jogger Pro Plus Belt - For average waisted men. Ideal for "Sinkers" - men or athletes with more muscle mass. This belt has 50% more buoyancy than the Classic. Resilient closed cell foam won"t absorb water, dries quickly, and resists chlorine damage. Patented contoured design supports and strengthens the lower back. Soft, flexible foam narrows at the waist for comfort and freedom of movement. Easy-to-operate quick-release buckle ensures a hassle-free fit. Custom-woven elastic belt comfortably moves with every breath and adjusts to fit waist. The AquaJogger® design tones the abdominal muscles without doing a single sit-up due to the continual use of abdominal muscles to maintain correct posture. To accomodate different body shapes, belt can be worn upside down or with the foam in front of the body.