The DeSantis Super Fly holster is constructed of a very tacky material, often compared to fly paper, meaning that the holster will absolutely not budge in your pocket. Additional features include a removable outer flap to further break up your pistol's outline, slick pack cloth interior for a friction-free draw and polymer reinforcements in critical areas. DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.