Engineered to fit curved or straight blades. Unique patented design. Covered with Tough Military Ballistic Nylon. Sunguard UVR bonded polyester thread stitching. Belt loop attachment made with durable polyester webbing. Custom made inner liner with open top for maximum drainage. While our Blade Tamer Sheaths will fit almost any appropriate knife, they are specifically designed to accommodate knives by R.H. Forschner. In particular, the unique shape of the ergonomically designed handle, along with the curved blade and raised tip of the breaking knives, make the patented design of "Blade Tamer" a necessity. Well tested and trusted!