The flap covers the magazine from all sides and makes sure that no dirt, sand or water can access the magazine pouch. The flap is secured via plastic buckle and can be silently opened with gloves.
The pouch is made of 1000D nylon and nylon stitching. It will last you a long time. The main compartment is reinforced with a plastic insert so that the pouch doesn't collapse when the magazine is not inserted for smooth reloads.
With the standard Molle on its back, this mag pouch can be mounted to any Molle platform.
HOW TO MOLLE
For some, it's straightforward, for others, it's something to learn.
Check out this gif to see how to molle your pouch perfectly in order to have it as safe and fixed as possible.