Using your Arkel Shopper Urban Pannier is easy. First, use the Cam - Lock® system to attach the pannier to your bike rack. It'll take just seconds to secure it. When you need extra space, pull the drawstring sleeve to expand the capacity from 25 L to 29 L. When you're done using it, simply fold it tight against the rack. As for maintenance, keep it clean by wiping it with a damp cloth. Avoid using harsh chemicals as they may damage the material. Also, store it in a dry place when not in use to prevent mold and mildew. And remember, since it's hand - sewn, handle it with care to ensure its long - lasting quality.