The Universal 3-Magazine Holster of Elastic & Velcro by Magills is designed to be used inside the concealment pockets of specified concealed carry jackets.
The body of the universal holster is somewhat rigid to help support the weight of your concealed mag pouches.
The Hook & Loop Velcro backing features the 'Hook' of the Velcro, which works with all of the concealment pockets of the jackets listed below.
Tactical Concealment Water Repellent Polyester Jacket
Classic Blue Jean Handgun Concealment Jacket