MEN'S HIGH WAIST SLIMMING COMPRESSION BODYBUILDING BODY SHAPING BOXER PANTS - BLACK, MEDIUM Great for Sports - increased blood/oxygen circulation for higher energy and improved athletic performance and lower risk of injury Core strength development is essential to provide long-term wellness and lumbar health Employs a proprio-receptive training concept used in occupational and physiotherapy to engage and strengthen core muscle groups Material: 90% Nylon, 10% Spandex Sizes (Pants): M (Waist 34~37'') L (Waist 37~41'')