What we can say for sure is that the mountain design and Lightweight performance of the Steep Lines OTC Snow sock will have you sending it down the slopes regardless. And don't sweat the ski boot experience - with Merino Wool's breathability and precision fit, you'll be launching your next snow mission in climate controlled, blister-free comfort. Over-the-calf in a pull-on style. Lightweight cushioning throughout gives you added comfort and durability where you need it most. A performance fit that doesn't slip or bunch and that's designed to help prevent blisters. Reinforced Achilles cushion reduces heel lift. True Seamless toe is fused together for an incredibly smooth feel. Merino wool provides warmth and breathability so you can stay comfortable no matter what the weather is like. 54% nylon, 42% merino wool, 4% lycra spandex. Hand wash only. Made in the USA.