75.8% Cotton, 19.6% Polyester, 2.2% Rubber, 2.2% Spandex, 0.2% Nylon.You can refer to the size chart on the left side of page. Warm & Soft: To keep feet warm whole day, our athletic socks are cushioned with thick cotton, get your feet wrapped with softness. And considering to maintain the warmth, these running ankle socks are made to ankle length, protecting your ankle from any coldness. Breathable & Snug: To keep feet dry, these running socks are made of moisture wicking fabrics , while the mesh ventilation panels make your feet breathe freely, help your feet no sweaty, keep your feet fresh and cool all the day . Durable & Stable: To reinforce heel and toe, our mens ankle socks with smooth seamless toe can get rid of blister easily. High density knitting elastic band holds the sock tightly around your ankle to prevent socks from slipping down. At the same time, arch support in the middle of the sports socks supplies extra comfort and support. 4 Size to Choose and Multiple Occasions for Men and Women: We have 6 pairs of socks in one package and 4 sizes from S to XL in Black, White, Grey for options to suit most of our customers. Our sport socks with soft fabric and suitable thickness which are perfect for all seasons and outdoor sports activities. Professionally customized for running, working and daily life. Supreme After-sales Service : FITRELL provides good after-sale production service. If you have any questions, please feel free to contact with us, we will send a replacement to you or give you full refund until you satisfied, we only want to give you the best service!