SMARTWOOL When you want the absolute minimum between your feet and your ski boot for a more technical fit, you need our PhD(R) Ski Ultra Light socks. Our thinnest, most lightweight ski socks equip you with our Indestructawool(TM) technology for enhanced durability, our 4 Degree(TM) elite fit system for a dialed, performance-oriented fit, and our Shred Shield(TM) technology for reduced wear from toes. They are designed with a wider welt to help ensure all-day comfort and body-mapped mesh zones help keep things breathable. All in all, these are the socks you want in your technical ski boots as you head for a day full of skiing. FEATURES4 Degree(TM) Elite Fit SystemFor a dialed, performance-oriented fit with flex zone at ankle jointIndestructawool(TM)Indestructawool(TM) technology features a patent-pending construction method for exceptional durability and comfortShred Shield(TM)Shred Shield helps reduce wear from toesUltra Light Cushion SnowThe absolute minimum between you and your boot. Ideal for new, vacuum-tight boots.TECH SPECSSock Height: Over the CalfWider welt for secure fit and comfortBody-mapped mesh zones for added breathability14" overall heightKnit in USA: 55% Merino Wool, 41% Nylon, 4% Elastane