Belt Size : Please provide note while placing the order about belt size M(waist size 30 to 36) L (waist size 36 to 40) STABILIZE YOUR BACK & REDUCE STRESS � Alleviate pain and reduce muscle stress to protect yourself against injuries and to stabilize your spine IMPROVE YOUR LIFTING PERFORMANCE FOR ALL SPORTS � Perfect for weight and power lifting, gym workouts, bodybuilding, squats, dead lifts, cleans, snatches, and CrossFit.