GunfightersINC Kenai Chest Holster, Kydex Shell, Nylon Harness, Fits FN Five Seven MK3 TB, Gray Shell, Coyote Brown Harness, Right Hand KN-FN57MK3-MAS-040221 The Kenai Chest Holster was designed as the ultimate way to carry a firearm when hiking" hunting" fishing" or any other outdoor activity. Gunfighters" Inc settled on a blend of Kydex and Nylon for excellent retention characteristics" weatherproofing" and lightweight. The Kenai Chest Holster is a perfect pairing with a modern polymer framed pistols or classic big-bore revolvers.