Looking for a sock with the strength of a steel-toe boot? You just found it! The Dura-Zone Medium Crew Utility Sock is the perfect match for long days on the job. Crafted from KEEN’s Dura-Zone high-tenacity nylon fibers, the heel and toe area are – weight for weight – 15 times stronger than steel! Merino wool wicks moisture away from the skin and helps regulate body temperature. A KEEN.Wunderseam seamless toe in the flex zone helps avoid bunching, while impact cushioning guarantees long-wearing comfort. Heel-hold cup construction ensures a secure, more natural-fitting sock. The left and right foot design further optimizes the fit. Merino wool/nylon/Dyneema polyethylene/polyester/Lycra spandex fabric blend. Imported.