Winter Socks. Ultralight merino-blend performance with over the calf compression fit. Like a breath of fresh air for your feet. The women's Burton Performance + Ultralight Compression Socks harness the all-natural power of wool to keep you hiking, riding, or just chilling in comfort. All-Natural Merino Power An ultralight merino blend sets you up for dry, comfy, stink-free feet. Made to Move Their snug compression fit and full elastic arch support are designed to support active days. Fabric 45% Polyamide, 36% Merino Wool, 12% Polyproylene, 7% Elastane Features + Tech DRYRIDE Ultrawick™ Venting Toe Panels Chafe-Free Link Toe Seam Quick-Drying and Odor-Resistant Polypropylene Reinforced Footbed All Over Elastic Support Drop Needle Construction for Maximum Breathability Sock Lock Reinforcements Ergonomic Articulated Left and Right MotionFit Low Profile Welted Cuff Ultra Lightweight Imported Yes Warranty Lifetime Warranty Sustainability Responsibly Sourced Wool (RSW) S/M M/L Shoe Size: US Women's 4-7 7-10