The Triple K 313 is a reproduction of an early belt holster. The California Slim Jim is made from skirting leather. Good leather stretches slightly with prolonged use. Since Triple K's leathers are the finest, they allowed for the natural expansion of the holster body by tightening the fit during the molding, bonding, and stitching of our holsters. A secure, safe fit is therefore always assured. The fit is so tight it seems that gun was made for the holster.