The 2XU Compression Short is engineered with powerful PWX FLEX and PWX WEIGHT fabrics to wrap and support the key muscles of the upper leg reducing muscle oscillation and allowing the muscles to operate more efficiently leading to less fatigue while enhancing circulation through targeted compression. The Elite Short has a higher power PWX WEIGHT fabric in the center front and back panels for additional support to hamstring, abductors, gluts, and quads. The 2XU Compression Short is suitable to wear alone or under competition uniforms. Care instructions To best care for 2XU garments:Machine wash in cold water with like colours.Do NOT Tumble dry. Hang to dry in a cool shady area away from sun.Do not use bleach, fabric softeners or dryer sheets. Do not iron.