Using this Osprey padded pocket pack is easy. First, decide whether you want to attach it to your shoulder strap or hipbelt. For shoulder - strap use, place it vertically, and for hipbelt use, you can position it horizontally. When packing, use the internal stretch divider to separate different items and keep them organized. Attach your keychain to the key clip so you won't lose your keys. As for maintenance, since the main fabric is nylon stretch mesh, you can gently hand - wash it with mild detergent when it gets dirty. Avoid using harsh chemicals or bleach as they might damage the fabric and the DWR treatment. Keep it in a dry place when not in use to prevent mold and mildew. And remember, this pack is designed to protect sensitive items, so don't overload it with heavy or sharp objects that could break the compression - molded body.