READY FOR ANY MISSION, ANY ENVIRONMENT, ANY TIME. Developed side by side with the United States Marine Corps, the RAT (Rugged All Terrain) earned its name among elite warfighters as being the only proven USMC rugged all terrain boot available. Precisely crafted with a highly durable nubuck leather, a tear resistant 1000 Denier nylon, an abrasion-resistant polyurethane reinforced heel and toe cap and an advanced Vibram 360 Dri Ice outsole, the RAT embodies Danner's commitment to crafting higher standards. We recommend women select 1.5 to 2 full sizes down for correct fit. The RAT embodies Danner's commitment to crafting higher standards. The current sizes and widths we have are: 14.5 N Made in the USA VIBRAM sole Shaft measures approximately 8 " from arch NUBUCK LEATHER & 1000 DENIER NYLON UPPER For superior abrasion- and scuff-resistance, we use full grain nubuck leather combined with lightweight, breathable Denier nylon. This combination offers some of the best protection in cold and wet environments. USMC CERTIFIED Developed side by side with the United States Marine Corps, the RAT (Rugged All Terrain) earned its name among elite warfighters as being the only proven USMC rugged all terrain boot available. SPEED LACE SYSTEM Our special hardware allows you to tighten from toe to top with one swift tug for a secure, tight fit.