These Muck Boot Extreme Conditions Arctic Sport Boots are graded for wear from -40 to 40 degrees F, and are vegan. Like all Muck Boots, they're 100% waterproof and highly breathable. Their light weight and extreme level of comfort makes them our go-to for cold weather. Pair then with leggings for casual outdoorsy wear, or take them on a winter snowshoeing excursion in northern Quebec. Muck Boot Company offers vegan options for high-performance heavy-duty winter boots. They have some vegan options.