85%Cotton+12%Polyester+3%Spandex Mens No Show Socks. Mens No Show Socks Lot Pack:(7 Pairs),and Size(6-9). Mens No Show Socks:(7 Pairs), Size(6-9). REINFORCEMENT OF THE TOE: Due to the relatively high pressure received by the toe, it is difficult for a layer of fabric to resist high-strength friction. BREATHABLE: The front mesh can effectively control the smell and keep the feet refreshed all day long! NON-SLIP, NOT FALLING??Three non-slip silicones will be firmly attached to the heel to prevent slipping. If it slips, we will replace it for free or a full refund! AFTER-SALE WARRANTY: WANDER’s customer service will always be there, no matter what problem you have, you can always contact me!