Using this sheath is easy. First, open the hook - and - loop flap and place your smartphone or battery case inside. To attach it, you can either loop it onto your belt or backpack strap. If you want to use it on a MOLLE platform, you'll need to buy the mod strap separately and then attach it. As for maintenance, just use a damp cloth to wipe it clean when it gets dirty. Don't use harsh chemicals as they might damage the material. And remember, the battery case shown in the picture isn't part of what you're buying.