SMELL CONTROL & MOISTURE WICKING: 82.2% Rayon from Bamboo, 15.6% Polyester, 1.3% Spandex, 0.9% Elastic. Compared to cotton, its properties can provide a effectively way to keep the sweaty feet smell free. The hollow structure of bamboo fibers makes them super-absorbent and breathable, to help stay comfortably fresh. HIGH PERFORMANCE: Extra cushioned sole provides the perfect amount of support, absorbs impact and protect your arch. Mesh on top can reduce heat and make the feet at the perfect temperature and smell fresh during any physical exercises. FOR SENSITIVE FEET: +MD unique hiding seam toe design do the best to make your toe release from any discomfort or irritation. Stretchy top ensures your socks stay put without marking and your feet feel great all day long. FOR ALL SHOES & SEASONS: These Bamboo Socks are no show in your casual and sports shoes. 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. ELASTIC& DURABLE: 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.