I use a Ventura Thruxton tank bag. It's about 20 litres, attaches via magnets and holds a [email protected] load of stuff. As I commute to work, it has wet weather gear, work shoes, work pants, lunch, wallet, phone, keys, building access card etc. Normally also an iPad.
On occasion, I've even managed to fit my 15" MacBook Pro in there... wouldn't recommend that though for a couple of reasons. Main one being - do you REALLY want all your data rubbing up against some super-powerful magnets? Didn't think so!
Link: Thruxton (Magnetic Tank-Bag), Motorcycle luggage, hard soft motorcycle luggage, racks, touring luggage | Ventura
On occasion, I've even managed to fit my 15" MacBook Pro in there... wouldn't recommend that though for a couple of reasons. Main one being - do you REALLY want all your data rubbing up against some super-powerful magnets? Didn't think so!
Link: Thruxton (Magnetic Tank-Bag), Motorcycle luggage, hard soft motorcycle luggage, racks, touring luggage | Ventura