Our Run Zero Cushion No Show Socks may be out of sight, out of mind, but they&';re totally dialed in on every run. The no-show silhouette stays hidden in active footwear, while a sewn-in binder and internal heel gripper offers a secure, stay-in-place fit. Each pair is made with responsibly sourced Merino wool and enhanced with Indestructawool(TM) technology for added durability, and a Virtually Seamless(TM) toe for additional comfort. Plus, the 4 Degree(TM) Elite Fit System offers a performance fit with strategic stretch and mesh zones to promote breathability while helping protect against blisters. No show silhouette designed to stay hidden in active footwear Sewn-in binder and internal heel gripper for secure, stay-in-place fit Indestructawool(TM) durability technology is intentionally knit into high impact wear zones, helping your socks outlast your longest adventures 4 Degree(TM) Elite Fit System offers a performance fit with strategic stretch and mesh zones to promote breathability while helping protect against blisters Virtually Seamless(TM) toe technology is a flat knit toe seam designed for additional comfort Shred Shield(TM) technology designed to reduce wear from toes Made in the United States of America: 51% Wool-Merino 46% Nylon 3% Elastane Machine Wash Warm, Inside Out Do Not Dry Clean Do Not Iron Tumble Dry Low Do Not Bleach Zero Cushion The absolute minimum between you and your footwear.