Performance Fit: No slipping, no bunching, and no blisters. True Seamless: Undetectable seam fusion for an ultrasmooth, invisible feel. Fine Gauge Knitting: Unprecedented durability and our unique "put it on, forget it's on" feel. Fast Action Wicking: Pulls moisture away from skin. Fast drying. Merino Wool: The ultimate fiber for breathability and comfort in all conditions. Still made in Vermont, USA. Still unconditionally guaranteed for life. Everything you love about the versatility, performance and comfort in Darn Tough's Standard Issue Mid-Calf but with a dollop of cushioning on the bottom of the sock.