Don't bother compromising with the all new MerinoMaxx MX series. Made to deliver performance across the board, the MX series uses a special blend of yarn to give you the benefits of durable and odor free merino along with quick-drying CoolMax® to keep you on the trail. Light cushioning and FlexZone technology work together for an unparalleled fit guaranteed to keep your feet happy mile after mile. Women's fit ECO Coolmax Merino blend for comfort and performance VentZone technology helps dissipate heat Selective cushioning keeps feet comfortable all day long FlexZone in the ankle allows for unrestricted movement and perfect fit Smooth, flat knit comfort toe seam 35% COOLMAX® Ecomade Polyester, 27% Nylon, 26% Merino Wool, 5% Acrylic, 5% Polyester, 2% Spandex Style# 2571