Aero Tech Men's Spandex Workout Shorts Made in USA to provide light compression for exercise and muscle support 86% Nylon and 14% Spandex Made in USA Our Compression Spandex Shorts increase blood circulation which oxidizes the muscles during exercise. More oxygen reduces the buildup of lactic acid which shortens recovery time. These shorts are the perfect option for all physical activities. The decreased muscle movement eliminates excessive effort of muscle during exercise. Guaranteed to provide years of comfort and performance for any active lifestyle. The two panel, streamlined construction is designed for comfort. It has a soft  inch elastic waist and cover stitched leg hems that are bar tacked for longest life. Premium fabric is soft 7.4 oz. 86% Nylon 14% Spandex tricot knit four way stretch. The high quality fabric will NOT snag and will last for years. Men's Waist (Inches) X-Small 24-26, Small 28-30, Medium 32-34, Large 36-38, X-Large 40-42