NO MORE SMELLY SWEATY FEET: 71.9% Rayon from Bamboo, 23.3% Polyester, 4.2% Elastic, 0.6% Spandex. The hollow structure of Bamboo fiber makes them super-absorbent and breathable. Bamboo made socks can wick away sweat and quick dry. Bamboo fiber provides a way to keep the sweaty smelly feet smell free. PADDED SOLE & MESH TOP: Extra cushioned sole provides the perfect amount of support, allow you to walk in comfort all day long. Mesh on top can reduce heat and make the feet at the perfect temperature and smell fresh in any condition. HIDDEM SEAM TOE & STRETCHY TOP: Unique hiding seam toe provides a seamless feel by eliminating bulky seams to reduce abrasion and prevent blisters. Elastic top gently conforms to your feet without squeezing and also makes sure the +MD Bamboo crew socks stay in place. FOR ALL SEASONS: Comes in various cute vivid solid colors for business & casual. Premium Bamboo fabric allows air to circulate. Thermo-regulating keeps your feet cool during the warm months and helps maintain the heat during the cold days. LONGLASTING: They may look smaller generally, but they are super stretchable. Bamboo fiber will be much softer after the first wash. We suggest you wash them before you put them on. The fabric is durable and sustains its softness even through multiple washes.