FITS Heavy Expedition &ndash; Boot: Durable, Cushioned Outdoor Socks HEAVY EXPEDITION: Get Your FITSand brave the cold! The ultimate combination of Merino Wool for cold weather insulation and the performance that comes from a perfect fit is just the thing for hunting, fishing, hiking, or camping. TYPE: FITS Expedition offers mid calf height, perfect for taller outdoor boots. This sock is loaded with 100% Merino Wool on the inside against your foot so all you feel is comfortable and dry in any cold or wintery conditions. FIT: The patented Full Contact Fit hugs the contours of your foot and stays put so there is no loose socks to rub you the wrong way and a Full contact welt to avoid slippage. CUSHION: The heavyweight full foot cushioning for warmth and protection will keep you warm, dry, and comfortable in any environment. FABRIC: The perfect blend of super-fine Merino Wool for comfort and performance and a durable Nylon exterior for extended wear. Fabric Content: 74% Merino Wool, 13% Nylon, 8% Acrylic, 3% Spandex