CW-X Conditioning Wear Men's Ventilator Tights 2-way stretch Support Web Nylon 80%/Lycra 20%; 4-way stretch body fabric Coolmax 80%/Lycra 20% Imported Flat seam construction for comfort Built-in air conditioning through stretch mesh ventilator panels in the quadriceps and calf muscle areas of the leg Patented Support Web provides targeted support to key muscles and joints specifically in the knee calf IT band and hip flexor areas Versatile performance for both outer wear and as a base layer Reflective logo increases visibility in low light conditions