This MOLLE Window ID Pocket was designed to be used with the K9 Tactical MOLLE Vest, and attaches to the vest in two ways. It can be used on the sides of the vest or on the vest top back. On the back of the Window ID Pocket are MOLLE straps and Velcro. You can attach the Window ID Pocket on the top of the vest back with the Velcro or use webbed MOLLE sticks to attach the Window ID Pocket to the vest sides. Webbed MOLLE sticks are sold separately. Inside the Window ID Pocket is coordinating Velcro strip so if you purchase patches with Velcro backs they will stay straight inside the vinyl pocket. The full side length of the window pocket opens for easy loading of your ID, paper work, or patches. The full top of the window pocket is clear heavy gauge vinyl, and 1000 denier Cordura is used on the back of the window pocket.