THE FASTBACK ADVANTAGE - Much like the fastback cars of our past, our Fastbacks were designed to do more than just be a daily driver. The cuff is slung low and strong, designed to be just high enough to interface between you and your shoes while having the power to stay in place all day without slipping off your heel. The real thing that sets the Fastback apart from its rivals is our Contour Terry.™ From the raised heel cup to the mid-foot contour that cradles your foot where laces can be rough on your feet, our Contour Terry™ aims to give you the comfort where you need it, not just where it’s easy. The Fastback has an InStep Flex™ panel, V-FORM™ arch support elastic, and medium terry along the entire footbed for lasting comfort. The natural moisture wicking and anti-microbial properties are there to work as hard as you do, designed to stay with you on your best days, and your rest days. If that’s not enough, we’ve added a generous toe vent that lines up with the vents on your favorite pair of workout shoes. With the marriage between the superior strength and breathability of wool with next level sock construction, the Fastbacks are built to last, and to go fast. THE PERFECT ANKLE SOCK - These high-quality Ankle Socks fit comfortably above the average running shoe and right in line with the edge of a low-hiker boot, which means this sock should be your everyday-wear sock for years to come. ROCKY MOUNTAIN MERINO WOOL - Fine Micron Rambouillet Merino Wool, sourced in the USA, makes these socks comfortable. HIGH-GRADE MATERIAL- 38% Wool, 60% Nylon, 2% Elastic - this combination of wool, nylon, and elastic is ideal for maintaining the benefits of wool - wicking, breathability, stretch, and insulation while gathering in the benefits of nylon and elastic - namely increased durability and material bounce-back. ANTIMICROBIAL/ANTIBACTERIAL - Because these socks are antimicrobial and wick moisture so well, they feel and smell fresh at the end of the day. 100% MADE IN THE USA- GRIP6 is a provider and supporter of high quality, domestic jobs. Not only are these socks made by GRIP6, but the materials are also sourced from the USA and much of the wool comes from our backyard, the Rocky Mountains. UNLIMITED LIFETIME WARRANTY- The GRIP6 A3 Guaran-Damn-Tee protects against any malfunction, accident, and all possible wear & tear. Our high-quality products were designed to last a lifetime. We believe in these socks enough that we'll pay return shipping if they're returned within 60 days (domestic orders only). EASY WASH & CARE - Wash it normally with your clothes in a cold, unbleached cycle. For the best results, turn them inside out.