Lorpen's lightest and thinnest sock using their T3 construction. The combination of Merino Wool and PrimaLoft® Yarn results in faster drying and wicking than just Merino Wool while still maintaining a comfortable feel against the skin.  Best suited for cold weather activities where moisture is an issue. Primaloft® Yarn is made up of ultra-fine polyester fibers which are finer than cashmere, resulting in a luxuriously soft feel while providing unparalleled moisture wicking. When hiking, climbing or doing any aerobic activity, your body works up a sweat and emits heat and perspiration, but when you suddenly sit idle, you can easily start to freeze with an insulation that absorbs water. Primaloft®fibers wick moisture away from the skin and trap body heat. Perfect for skiers who need a thin and lightweight sock that still keeps their feet warm and dry. Features: Primaloft® Yarn insulation is soft against the foot while working to trap body heat and wick moisture away from the foot Merino Wool for warmth and a soft feel against the skin 10% Stretch Nylon with LYCRA® all throughout the sock means no slipping or bunching up. These socks will stay up all day long. Non cushioned, thin, and lightweight The Flat Knit Toe Seam means no irritation on your toes Women's T3 Ski Superlight Sock