DETAILS Performance Fit:    No slipping, no bunching, and no blisters Fine Gauge Knitting:    Unprecedented durability and a unique “put it on, forget it’s on” feel. Fast Action Wicking:    Pulls moisture away from skin. Fast drying. All Weather Performance:    Cool in the summer, warm in the winter. Naturally Antimicrobial:    Repels bacteria and odor. Guaranteed For Life:    No strings. No conditions. For life. Merino Wool:    The ultimate fiber for breathability and comfort in all conditions. True Seamless™:    Undetectable seam fusion for an ultra smooth, invisible feel. FABRIC 52% Merino Wool 46% Nylon 2% Lycra® Spandex