A Work Sock, a Sport Sock, a Boot Sock. Any of these descriptors will fit this rugged work horse. The 100% Merino wool is knit into a mid-weight construction of terry loops on the inside to control moisture while keeping you comfortably warm. The nylon exterior provides maximum durability and abrasion resistance. The patented Full Contact Fit® hugs the contours of your foot and stays put so there are no loose socks to rub you the wrong way.