ChillBlocker Waterproof Socks , Crew Length, Black, Large

This three layer membrane crew length waterproof sock is insulated with a liner made of expedition-weight double velour Polartec® Power Stretch™ fleece. The outside layer is knit of nylon/lycra® spandex offering a durable, flexible, stretch covering. In between the two fabric layers is a waterproof MVT membrane. The combination of these three materials provides a very soft, comfy, warm, stretch-to-fit sock suitable for a whole host of cold, wet, outdoor conditions.
• Waterproof, breatheable
• Each sock is high-pressure tested to make sure there are no leaks
• Thermal Protection Level: H4