CamelBak Mule 2012
The CamelBak Mule (2012 edition) could be the perfect activity bag. CamelBak's are of course known for their water bladder and pipe system, making it easy to drink on the go without having to stop, unpack and repack your bag. The Mule has a 3 litre bladder with all the features you would expect from a CamelBak — Quick Link™ System, 1/4 turn easy open/close cap, lightweight fillport, dryer arms, center baffling and low-profile design, patented Big Bite™ Valve, HydroGuard™ technology, PureFlow™ tube, and an easy-to-clean wide-mouth opening. CamelBak say 3 litres is enough for 3 or more hours of mountain bike action.
The rucksack itself has a cargo capacity of 9.5 litres, packed with pockets and features — a media pocket, bike tool organizer pocket, stash pocket, four point compression, and stretch overflow helmet storage. It's designed to carry a helmet, multi-tool, pump, spare tube, extra layer, lunch, MP3 player, phone, wallet and keys — so pretty spacious whatever your use.