Bulldog Belt and Clip Ambidextrous Black Size 31 Extreme Holster for Most Large Frame Autos with 4" - 4.5" Barrels - FSN-31 Four wall construction. Outer wall fabric is heavy duty 1200 denier water resistant Nylon. Inner wall has a vinyl vapor barrier, deluxe padding and a soft scratch resistant fabric. Ambidextrous clip and belt loop.