Designed for cold, wet, and unforgiving conditions, the DexShell Hytherm Pro socks are the ultimate in waterproof warmth. Built with a Porelle® membrane for complete waterproof and windproof protection, they feature a merino wool-rich inner lining that offers natural insulation, softness, and moisture management. The durable outer shell resists abrasion, while the 4-way stretch construction ensures a comfortable, non-restrictive fit. Perfect for winter hikes, snow sports, or long days in freezing rain, these socks keep your feet warm, dry, and comfortable when it matters most. Size Small Medium Large X-Large EU 36-38 39-42 43-46 47-49 UK 3.5 6-8 9-11 12-14 Features Warmest version with fully terry looped inners.Mulesing-free merino wool. Viral resistant. Outer: 97% Polyamide, 3 % Elastane. Interlining: Porelle® membrane (PFOA free polyurethane). Inner: 40% Merino wool, 40% Acrylic, 17% Polyamide, 3% Elastane Specification Age Group: Adult Waterproof Windproof Breathable Sock Height: High Crew