If you're into sports that are heavily foot-centric; e.g. mountain biking, trail running, or hiking, you'll love Injinji Outdoor Socks ($43 for a three-pack; reduced from $48). They are made with naturally wicking NuWool cotton, and have a micro-thin anti-friction membrane to separate your toes; this clever feature, combined with seamless sewing, virtually eliminates skin/skin contact blisters. You get triple-ply arch support to promote good blood and air circulation and minimize slipping. The socks are made of 25% nylon, 70% NuWool, and 5% spandex and are available in a three-pair pack. They're built for the out-of-doors -- hand wash and dry on a tree branch, or machine wash at home. And the best part? When you're not out on the trail, they're perfect for wear in front of a crackling fire, sipping a hot apple cider drink.