Made to deliver across the board, MerinoMaxxA(R) series uses a special blend of yarn to give you the benefits of durable and odor free Merino along with quick-dry EcoCoolmaxA(R) to keep you on the trail. a WoMen&';s fit a Flex Fit a Memory Knit a Moisture Wicking a Reinforced Heel/Toe a Shock Absorption a Stay Up Power a Comfort Toe Seam a Arch Support a Breathable Mesh a Anatomical a 37% COOLMAXA(R) EcoMade Polyester, 34% Nylon, 22% Merino Wool, 5% Polyester, 2% Spandex a Style #2576