Fit & Design: 4 Degree(TM) Elite Fit System offers a performance fit with strategic stretch and mesh zones to promote breathability while helping protect against blisters Strategically placed cushioning for comfort without the bulk Technology: Indestructawool(TM) durability technology is intentionally knit into high impact wear zones, helping your socks outlast your longest adventures Virtually Seamless(TM) toe technology is a flat knit toe seam designed for additional comfort Additional Details: Machine Wash Warm, Inside Out; Do Not Dry Clean; Do Not Iron; Tumble Dry Low; Do Not Bleach