We set out to make a tougher trail running sock. MudGear was born to do what nobody else could do; make a performance sock resilient enough to withstand outdoor race conditions and tough enough to help protect racers from the course itself. Using Premium Yarns and Strong Construction The difference comes from starting with American yarn blends that are chosen for their durability and comfort. Next, we engineered our socks to achieve specific performance results for their ventilation, moisture management, and abrasion resistance. We built in a medium level ankle compression to keep out dirt from the trail. In layman's terms, our trail socks make your feet feel great. And Tried In The Worst Conditions Possible Normal check of running socks involves a simple abrasion test to see how quickly they show wear. Our testing involves putting them on the world's top obstacle racers and trail runners for trips up and down mountains all day in all types of weather. We test for wicking by fully submerging them in muddy water, and we test durability by ultra distance marathons.