The Merino Blend Ski+ Light OTC Mountain Contour Sock is built with a distinct left and right shape rather than a generic tube fit, with zoned support at the toe box, Achilles, and instep to hold everything in place inside a ski boot. A seamless toe closure and reinforced heel and toe cut down on bulk and pressure points through a full day on snow. The merino wool blend regulates temperature and moves moisture away from the foot, while an over-the-calf height and light cushioning keep it from adding bulk under a boot cuff. What Our Gearhead(R) Experts Are Saying:"I wore these through a full backcountry tour and lift-served afternoon back to back, and my heels never slipped once inside my boots. No blisters at the toe seam either, even on the descent when my feet were working hardest."