To use this pouch, simply slide your M4 magazines into the open - top compartments. The bungee cords will keep them firmly in place. When you need a magazine, just reach in and grab it. Make sure to keep the bungee cords in good condition and check regularly that they can still hold the magazines securely. For maintenance, you can clean it with a mild soap and water when it gets dirty. Avoid using harsh chemicals that might damage the material of the pouch.