Crossactiv 4-inch Ultra Low Profile Performance Slimline Black Weightlifting Lifting Belt and Back Support. Ideal for Crossfit, WOD, Gym and Lumbar Back Support The CROSSACTIV weight lifting belt is ultra slim, maximizes performance, provides back and ab support, stability and comfort. MICRO ADJUSTABLE extra wide Velcro strap so you can adjust the tightness just how you need it, not where the next buckle hole happens to be! ULTRA LOW PROFILE, so the belt doesnt mess with your workouts, chafe you, get caught on your clothes and skin, or affect your movement ULTRA LIGHT AND CUSTOM MADE weve designed it for the best balance between lightness and comfort and support. Its so light that you can work out and barely notice the belt is there. INCREASE YOUR PERFORMANCE - we truly believe you will perform better using this belt - try it risk free!