Legendary Darn Tough construction for when equipment failure is not an option. Performance Trail Fit means no bunching, no slipping, no blisters. Side vents deliver superior breathability. Performance Fit: No slipping, no bunching, and no blisters. Fine Gauge Knitting: Unprecedented durability and our unique put it on, forget its on feel. Fast Action Wicking: Pulls moisture away from skin. Fast drying. All Weather Performance: Cool in the summer, warm in the winter. Guaranteed For Life: No strings. No conditions. For life. Merino Wool is fast drying, breathable and odor resistant for all-day comfort. Height:Quarter Weight:Midweight Style Number: 1959