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 large frame autos w/3.50-5" barrels.Type: Belt HolsterColor: BlackMaterial: NylonSize: Sz 08Hand: AmbidextrousFinish: SmoothFirearm Fit: Glock 21Mount Type: Belt Loop/ClipGun Type: HandgunCompartments: 1