Patented contoured design supports the lower back by suspending the body vertically in water at shoulder level. Belt may be worn upside-down or with the foam in front to accommodate different body shapes. Women's Classic fits most average body types. Men's Classic Pro is 30% more buoyant and has a higher arch. Blue. 48" woven elastic belt adjusts to fit waist. Includes Getting Started DVD and Water Workout Guide. Resilient closed-cell foam won't absorb water and resists chlorine damage.