59%Polyester, 35%Polyamide, 6% Spandex Imported Pull On closure Gentle cycle in cold water, hand wash recommended. EXCELLENT CHILDREN'S THERMO UNDERWEAR SET - The upgraded two yarn knit technology provides excellent ergonomic compression fit while offering better breathability and abrasion resistance for the joint parts. The updated fabric makes this functional underwear set for kids an ideal base layer for skins in fall, winter and spring, whether indoors or outdoors. WARM & FAST DRYING - Boys & Girls Ski underwear forms a thermal circulation system with its high mesh density. Besides, lightweight, breathable and moisture wicking fabric is great to keep sweat away and dry quickly, with nine air-regulating sweat channel areas and two sweat-guiding designs, the thermal underwear keeps kids' bodies heated during cold winters without worrying about sweat. FOUR-WAY STRETCH & ABRASION RESISTANT - Material composition is 59% polyester, 35% polyamide and 6% spandex, the flat seam process will not rub uncomfortably against your skin. The ski underwear improves your flexibility and mobility in any direction, while promoting blood circulation, reducing the formation of lactic acid, and protect your muscle trauma during exercise and sports. VARIOUS OCCASIONS - The sports skins thermals shirts and trousers is suitable for all types of winter sports, without bulky, not only for football, skiing, snowboarding, sledding, ice skating, curling, baseball, basketball, ice hockey, tubing, soccer and running, but also for daily wear at home. WORRY-FREE PURCHASE - If you have any questions about the set of thermal underwear set for kids, please feel free to contact us. We will always reply as soon as possible. Your support is our best motivation. Hope you can buy with confidence.