FIT TRUE TO SIZE MODEL WEARING Xl. waist trainer is designed with high compression material with a thick neoprene finish to enhance sweating. Our product acts as a waist trainer as well as a trimming sweat belt that can shrink your waist line by 1-3 inches. It is made with a flexible 9-steel bone structure to maximize your results, while still allowing optimal comfort and movement. The adjustable double-straps provide compression to give the perfect hourglass shape.