The 2XU Fitness Compression 4 inch Shorts are made for a light workout. Thelightweight compression supports your adductors and glutes, for reduced muscledamage during workouts. The 2XU material is designed for sports with medicaltechnology. It's high performance, but also lightweight with 360-degree stretchfor flexibility. LIGHTWEIGHT & FLEXIBLE SUPPORT High-performance,lightweight PWX fabric with 360-degree stretch knit, reduces muscle movementand upper body damage, improves postural awareness, enhances performance andreduces risk of injury. STAY COOL PWX VENT panels on the lower legs providemuscle support while improving airflow by nearly 200%. This increasesevaporation of your sweat to maintain optimal body temperature. QUICK DRYINGDurable, moisture-wicking yarn keeps you cool and dry. Compression features: -Reduced muscle fatigue, muscle damage and reduced risk of overuse injuries. -Improved performance and muscle alignment - Increased agility Other good toknow: - How to properly care for Form Mid-Rise Compression 4 inch Shorts:machine wash gentle cycle turned inside out at 30 degrees, do not use fabricsoftener, do not tumble dry, do not bleach, do not iron, do not dry clean. -Material composition: Outer fabric: 62 % polyamide / 38 % spandex / Lining:Unlined