"Thorlo® Trekking Thermal Wool Blend Thick Padded 3 Pack Socks: If you're spending long days on challenging terrain, these crew socks are built to handle the demands of extended trekking and backpacking. The thick padding under the ball and heel is clinically tested to reduce friction - the primary cause of blisters - and absorb impact where your feet take the most punishment. A blend of Thorlo's exclusive THOR-LON® acrylic and wool fibers works together to wick moisture away from your skin, keeping your feet drier during high-output efforts while providing the warmth and resilience you need in colder climates or at higher elevations.The construction combines 44% exclusive THOR-LON® acrylic, 39% wool-THOR-LON® blend, 8% nylon, 6% insulating hollow-core polyester, and 3% spandex. That hollow-core polyester adds an extra layer of thermal insulation, making these socks a solid choice for cold-weather trekking above the timberline. The wool contributes durability too - the sock holds its structure and insulating properties even after repeated use. Each pack includes three pairs, all made in Statesville, North Carolina, USA. Thorlo® backs these socks with a 30-day guarantee: if they don't feel better than ordinary socks, return them with your receipt for a full refund.Why Our Fit Experts Love It""I wore these on a long backpacking trip over two days of rocky, uneven terrain, and the thick padding under the heel made a noticeable difference by the end of each day. The wool blend kept my feet warm during a cold morning start without feeling overly heavy as the temperature climbed."" - Sullivan, Road Runner Sports Fit Expert, Naperville ILWho It's Best ForThe Thorlo® Trekking Thermal Wool Blend Thick Padded 3 Pack Socks are best for hikers and backpackers who need thick cushioning and moisture management during extended treks on varied or difficult terrain. They work well in colder climates or at higher elevations where warmth and durability matter as much as blister protection. This unisex sock suits anyone logging long days on trail who wants a clinically tested, made-in-USA option backed by a satisfaction guarantee. VIP Family members can take the Trekking Thermal Wool Blend Thick Padded 3 Pack Socks for a 90-Day test drive with our Perfect Fit Promise."