MOISTURE WICKING & ODOR CONTROL: 88.0% Rayon from Bamboo, 10.8% Polyester, 1.2% Spandex. The hollow structure of bamboo fiber makes them super-absorbent and breathable, so bamboo made socks can wick away sweat and quick dry. Bamboo fiber has the property of anti-odor for sweaty smelly feet, which keeps your feet odor free. CUSHIONED SOLE & HIDDEN SEAM TOE: Extra cushioned sole provides the perfect amount of support, allow you to walk in comfort all day long. Unique hiding seam toe provides a seamless feel by eliminating bulky seams to reduce abrasion and prevent blisters. MESH ZONES & REINFORCED HEEL: Mesh on top can reduce heat and make the feet at the perfect temperature and smell fresh in any condition. Big Y heel makes sure the +MD Bamboo Ankle Socks stay in place and give your foot the perfect fit. FOR ALL OCCASIONS & ALL SEASONS: Comes in classic black, white, grey for men and women, business and 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. STRETCHY & DURABLE: They may look smaller generally and even softer after the first wash, but they are super stretchable. Please according your shoe size to choose your right socks size. The fabric is durable and sustains its softness even through multiple washes.