BUYKUD 3PCS Long Sleeve Base Layer Compression Athletic Shirt, Tights, Top, Bottom, Thermal Underwear Sports Set, 12-13 Yrs, Blue Reflective Strip Size: 12-13 Years About this item: Abrasion-resistant, moisture wicking,fast drying fabric, promotting sweat evaporation helps to prevent body odor,machine washable special fabric wraps moisture away from the body - keeps you cool and warm in the winter in summer. Helping compress the core muscle area to prevent muscle soreness caused by lactic acid accumulation,protect knee ligaments and promote skeletal muscle growth,quickly achieve the desired athletics effect. Great for weight training, football, basketball,badminton,rugby, skiing, snowboarding tennis rowing cycling equestrian athletics etc and is even ideal as a base layer for motorcyclists and those who work outdoors.