DexShell’s Trekking Socks are perfect for year-round walkers who are looking for a fully waterproof, breathable and thermal sock. Warm and durable enough for long days in the mountains - with a thermal rating of 4 out of 5 - you’ll never suffer from cold, wet feet again. Plus their mid-calf length provides even greater protection from the elements.The Merino wool terry loop cushioning from toe to heel provides exceptional comfort, moisture control and temperature regulation. While the Porelle® membrane is a waterproof and breathable layer that stops rain and water from coming in, but lets moisture out. Meaning your feet stay warm, dry and sweat-free all day long. Ideal for any kind of walking, trekking, hiking and other activities in wet environments, DexShell’s Trekking Socks will protect you in all weathers. Features Waterproof, windproof and breathable High thermal performance Mid-calf length Moisture-wicking technology Robust design for long treks Thermal Rating: 4 out of 5