CW-X Men's Ventilator Stabilyx Tri Short 80% Nylon, 20% Lycra - 2-way stretch Support Web; 80% Coolmax, 20% Lycra - 4-way stretch body fabric; Machine wash warm with like colors. Line dry in shade, do not tumble dry. Do not bleach. Do not iron. Do not dry clean. Built-in "air-conditioning" through stretch mesh Ventilator panels in the quadriceps areas of the legs reduces excess heat build-up and heat fatigue. Abdominal support panel provides extra support to the lower abdominal muscles. Flat seam construction. Thailand