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You want ultra light socks for the instant response and superior snow feel, but you spend enough days on snow that you can't put up with frozen feet for much of your waking life. Get the Darn Tough RFL Thermolite Over-the-Calf Ultra Light Socks and get it all. Darn Tough's new Thermotlite® series uses an insulating polyester yarn for superior warmth without sacrificing durability or wicking, and backs it up with their usual True Seamless™ construction and lifetime guarantee.
64% Thermolite Polyester, 33% Nylon, 3% Lycra® Spandex
Ultra-Light – Darn Tough's lightest sock for race day or anyone looking for a lighter-than-air feel from a tougher than hell sock.
Over the Calf
Ultra-Light Cushion – Darn Tough's lightest sock for race day or anyone looking for a lighter-than-air feel from a tougher than hell sock.
THERMOLITE® Insulation – Insulated material specially engineered to provide warmth and comfort without weight.
True Seamless™ – Undetectable seam fusion for an ultra smooth, invisible feel.
Performance Fit – From form-fitting toe boxes to sculpted heel pockets and knit-in elastic support at the arch, Darn Tough knitting techniques produce the finest fitting performance sock available.
Fast Action Wicking – Pulls moisture away from skin. Fast drying.
Fine Gauge Knitting – Unprecedented durability and our unique “put it on, forget it’s on” feel.
All Weather Performance – Cool in the summer, warm in the winter.
Guaranteed For Life – No strings. No conditions. For life.