Knit in Vermont, Darn Tough Socks come with a lifetime guarantee. They've made the Retro Crew Light socks from Merino wool, nylon, and Lycra—meaning they'll keep feet warm. If your toes get damp, these socks will wick moisture away, keeping your feet from getting clammy and popsicle-like. Plus, these have a lightweight build, meaning that they're not going to be thick and bulky like those rumpled ski socks you used to wear. $20.