Uniquely body mapped with HEATR(R) in the glutes and quads with ProWikMax(R) fabric integrated for added muscle recovery and warmth. HEATR(R) is a high-tech material developed by WSI that helps keep you up to 40% warmer than other materials on the market. Fibers that are integrated within the fabric expand and heat up as they come into contact with the skin. Since the fibers are integrated in the fabric, they will not wash out. Pleated knee & back yoke detail. Wide waistband with built in elastic & hidden waistband pocket. 100% Made in USA