Size/Fit Summary: True to size, Regular fit. Take on the cold with the updated men's Sherpa boots. Merging two technical materials, these boots are handcrafted from natural rubber and insulating neoprene. 100% waterproof, the Men’s Roll Top Sherpa Boot is equipped with a firm grip perfect for slippery winter days. Featuring a fleece lining, Ortholite footbed and a thermal insulated sole, they can be worn in temperatures as low as 23°F. Available in a stylish grey combo and able to be worn multiple ways, roll them up or down on your next frosty outing or morning dog walk.