Injinji Over the Calf Performance Trail Socks Size Medium Mens 8-10.5 Womens 9-11.5 Fabric: 53% nylon, 38% coolmax polyester, 3% lycra Condition: New with Tags, there are a few black flecks in the thread but these are not holes From their website: Elevate your trail adventures with the Trail Midweight Over the Calf. These performance toesocks prevent blisters by eliminating skin-on-skin friction, while the Over the Calf height offers knee-high lower leg protection to keep debris out. COOLMAX® EcoMade fibers with a mesh top help keep feet cool and dry, while a supportive arch band and targeted cushioning add comfort on unpredictable terrain. Let me know if you have any questions. Thanks for looking!