The USGI Extreme Cold Weather N-1B MUKLUK Boots in size M are designed for extreme cold weather conditions, featuring a lace-up closure and a wool lining for added warmth. These green and black boots have a zipper accent and are slip-resistant, waterproof, and fire-resistant. Made for winter and snow, these boots are 20 inches in height and have a standard shoe width. With a cotton upper material and military issue branding, these boots are a reliable choice for outdoor activities in colder climates.