This is the No. 1 sock when nature calls. Look closely at this hike sock and youll see it's comfort and beauty. A blown-out seam should be the least of your worries. Thats why the Number 2 is also No. 1 when it comes to long-lasting toughness and active comfort as well. A performance fit means no slipping, no bunching, no blisters for peak hiking comfort True Seamless Toe technology for an ultra smooth, undetectable feel Reinforced footbed and Achilles cushion improves the comfort of our socks and helps them last longer Merino Wool is at home on the trail, naturally moving moisture to keep feet fresh and dry in all weather The midweight socks thermoregulate to wrap feet in steady comfort when temperatures change Materials 63% merino wool, 35% nylon, 2% lycra spandex