The Havamal was created to be a slim, clam shell style holster, primarily for kidney carry. It has had great success for concealing firearms up to an FNS 45 Tactical, with RMR. The short, rear wing helps pull the butt of the gun into the body. The stabilization fin helps prevent wobble or shifting of the holster when sitting, walking, etc. And the clamshell design, with a reinforced mouth, keeps the mouth of the holster open for easier reholstering.