The outside skin is a super non-slip material that, with a little pressure, adheres to just about anything. That outer material combined with the inner closed-cell foam and the inner liner keep your pistol and the holster securely in place. In the pocket, it works like any other pocket holster. However, when you pull the gun, the outer layer grabs the inside of your pocket. Our modular products use the same “Sticky” material against itself to hold the holster and gun in place. In addition, with use and body heat, your Sticky Holster will conform to your particular gun, making a custom fit.