The magnetic tank bag from Spada has a 14 litre capacity, and is even water resistant too. It is expandable and can increase its size by 40 percent! The bag has super strong magnets which really attach to your motorcycle tank and there are additional nylon securing straps for extra security. The zips are waterproof and it comes with two external pockets, which are good for storing your phone and wallet. Also included in the price are high visibility 70D PU coated waterproof covers, which are handy if you get caught out in a rain shower.