Hydro-Fit 131 Medium Blue Easy-Close Wave Belt with Velcro Closure Spend more time working out and less time adjusting your buoyancy belt. Sound impossible? Not with this belt! Our Easy-Close WAVE Belt® features a strap with a heavy duty Velcro-like closure. Fitting and adjusting are made simple with the Easy-Close feature. Made of soft and durable EVA foam, the Easy-Close WAVE Belt forms to the natural shape of your body. Its unique contour shape balances buoyancy evenly around your torso, enhancing correct posture and body alignment.