4ucycling Windproof Athletic Pants for Outdoor and Multi Sports fleece Double-layer synthetic material (75% polyester) in the front, which gives the pants a unique water repellent quality without being too clingy or tight. This offers the athlete more flexibility in mobility. Breathable material on the back, which is composed of 85% polyester 15% spandex. Engineered to offer the athlete extra comfort levels through exceptional padding and cushioning. The improved aeration is quintessential in preventing excessive sweating during rigorous training sessions. Thermo-lined fleece interior. Useful for prevention of loss of heat from the body, even under extreme wintry or snowy conditions. The thermal retention capabilities of these pants are also enhanced by the draping design in the knee area. Zippered pockets with sturdily built zips on each side coupled with easy to adjust leg openings. This gives the athletes the much-needed flexibility around the knee area. Reflective logo on the left . Improves the visibility of the athlete under low or poor lighting conditions. Integrated as a safety standard for professional and fitness cyclists .The size run smaller than usual,please choose one size up at least your U.S.normal size