Weather is no match for Mavic's Thermo Plus Shoe Covers. Their Warm Shell ST fabric is insulated and stretches to fit over your shoes, and double fabric on the toes keeps the chill out. They also boast non-slip pads for walkability, Mavic's Exogrip elastic cuffs to seal air out, and reflective accents for safety. A clever side flap gives you access to your shoes' ratchet buckles in case you need to adjust mid ride. There's even a spot to slip in a heat pack if it gets really cold.