The Batteries make the difference. Put on a pair of MPI Outdoor HEAT SOX , before you put on your boots, and they will provide safe heat to...more info

A fully cushioned thermal boot sock, which includes a extra-smooth reverso toe closure....more info

This flat knit sock provides a close, lightweight fit that acts like an adventurer's second skin to minimize friction and blisters. Use with...more info

Ultra soft Merino Wool Boot Sock with an integrated Olefin liner for the ultimate in dry-lined comfort. Because the liner is fully integrated...more info

Black top with undyed, untreated cotton foot. Prevents problems with dyed yarns. Content: Foot: 90% Cotton, 10% Nylon. Top: 90% Acrylic, 10% Nylon...more info

This is Smartwool's most heavy-duty outdoor sock. When you're going to extremes like mountaineering, ice climbing and long backpacking treks,...more info

The A.T. Boot Plus is a 3-4-season sock combining the thermal and comfort properties of soft Merino Wool with the moisture transport properties...more info

Ultra-Light Weight Over-the-Calf Ski Liner. Flat Knit. Elastic Ankle support. Flat Seam. Elastic Arch Support. Content: 80% Microsupreme, 15%...more info

Natural antimicrobial benefits of silver. Great for outdoor sports enthusiasts worried about odor control. Over-the-Calf length. True 1x1 rib...more info