It wasn’t easy to improve on Duluth’s most durable socks. But the footwear experts at Duluth Trading didn’t stop until they were “sock-cessful!” The result: Midweight Performance Over-the-Calf Socks with more than double the abrasion resistance of original 7-Year™ Socks. Better yet, these high-tech wonders include temperature-managing COOLMAX® EcoMade polyester made with 100% recycled fibers that are both stronger and more sustainable. Nanoglide® nylon wicks away sweat and even fends off blisters. Plus they’re purpose-built with 3" worth of extended padding in the toes for steel toe durability. They’re a giant stride forward in sock performance!