Maximum Warmth Waterproof Socks. Designed for cold and harsh conditions, Hytherm Pro is DexShell’s warmest waterproof sock. The thick merino wool inner lining delivers enhanced insulation for winter walking, hiking, and prolonged exposure to cold and wet environments. Waterproof Protection with Breathability. A durable, waterproof yet breathable membrane blocks rain, snow, slush, and surface water while allowing moisture vapor to escape – helping keep feet dry and comfortable even in demanding winter conditions. Thick Merino Wool Inner for Cold Weather. The dense merino wool lining provides natural warmth, moisture regulation, and odor resistance, making Hytherm Pro ideal for low-movement or stop-start activities where heat retention matters most. Built for Harsh Winter Use. Designed to perform in cold, windy, and wet conditions, Hytherm Pro offers reliable insulation and protection for winter hiking, cold-weather walking, outdoor work, and extended time outdoors. Engineered & Certified for Reliability. Constructed using DexShell’s proprietary tri-layer lamination process for durability and flexibility. Manufactured in an ISO 9001:2015 certified facility with a PFOA-free membrane compliant with REACH and OEKO-TEX Standard 100. DexShell Hytherm Pro Waterproof Socks are built for extreme cold and wet conditions where maximum warmth and protection are essential. Featuring a thick merino wool inner lining, they deliver superior insulation and comfort for winter walking, hiking, and prolonged outdoor use. A durable waterproof yet breathable membrane blocks rain, snow, slush, and surface water while allowing moisture vapor to escape, helping keep feet dry and comfortable even in harsh weather. Ideal for cold-weather walking, winter hiking, and outdoor activities where warmth matters most, Hytherm Pro provides dependable waterproof performance with enhanced thermal protection.