As above. Needs to be able to fit a couple of tubes and a multitool. Doesn't need to be waterproof. It's for my work bike so either needs to be very cheap or easy to remove.

Thanks in advance.

Ive got a Topeak Aero wedge, the quickclip version in a medium

http://www.chainreactioncycles.com/Models.aspx?ModelID=7360

Dosent run on your legs, clamps nice and firmly, and can be removed in seconds. Its like a little tardis too, Enough space for a tube, multitool, leatherman, chain link, patches, phone, backup lights, keys, and if you open the expansion zip, you could squeaze a very light weight jacket in there, lol.

http://www.carradice.co.uk/products/type/sqrslim

Edric – that thing is a behemoth! 16 litres capacity in a saddlebag?! First pothole with that thing fully laden and it'll rip your saddle off 🙂

haha user removed – ive got a 24 litre carradice camper it works fine 😀

might be a bit big though .

Ortlieb do 2 or 3 varying sizes that work well with roll tops and easy to move with rixen and kaul fittings – ie wont just fall off at random !

Edric – that thing is a behemoth! 16 litres capacity in a saddlebag?! First pothole with that thing fully laden and it'll rip your saddle off

have an SQR – great bags and very versatile.

as for little ones, look at the little plastic ortliebs mudracer or std

they unclip quickly

http://www.wiggle.co.uk/c/cycle/7/Bags_-_Saddle/

probably the loveliest saddlebag – and contrary to popular belief it is very stable an doesn't get in the way even when hanging out the back on decents