Bulldog’s Extreme holsters have four wall construction. The outer wall fabric is heavy-duty, water-resistant nylon and the inner wall has a vinyl vapor barrier with deluxe padding and a soft, scratch-resistant fabric. It has a spine protector to keep gun sights from tearing the inner lining. Fits Ruger Mark Style Autos w/4-5″ barrels. Fits Ruger Mark Style Autos w/4-5″ barrels.