ADDITIONAL PROTECTION. Featuring a women's specific design, this sock stays in place and offers a light cushion for all-day performance. The padded Achilles tab offers additional protection. ReliaWool(TM) technology in the heel and toe adds more durability than ever before.FEATURES Strategically placed mesh ventilation zones provide ventilation for temperature and moisture management Flat knit durable toe seam 7.5 overall height Sock Height: Crew Knit in USA of Imported Yarn: 64% Merino Wool, 34% Nylon, 2% Elastane