MOISTURE WICKING & SMELL CONTROL: 68% Bamboo, 26% Nylon, 4% Polyester, 2% Spandex. The hollow structure of bamboo fiber makes them super-absorbent and breathable. Bamboo made socks can wick away sweat and quick dry. Compared to cotton, its properties can provide a effectively way to keep the sweaty feet smell free. NON BINDING TOP & CUSHIONED SOLE: Goes on easy and stays up. Gently conforms to your feet without squeezing or restricting blood circulation. Great for great for wide calf or swollen feet, diabetes, pregnant, maternity etc. Extra cushioned sole provides the perfect amount of support, protect your arch and ankle. 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 Non-Binding Socks stay in place and give your foot the perfect fit. FOR ALL OCCASIONS & ALL SEASONS: Comes in classic white, black for all kinds of outfits. 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. LONG LASTING: 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.