http://ogio.com/power/flight-vest
i use the ogio flight vest, best gear organizer, water pack, and customer service I have seen and ive been though lots of camelbacks. the bladder it comes with is super tough and opens wide at the top easy to clean or add ice, the hose is easy to deal with as well. it has a tool specific compartment, a small rain jacket pocket on the back. pockets for snacks, goggles, phone,gps/radio, and whatever else you need for a full day of exploring. i also like the weight distibution its comfortable and the one size fits all tensioning system works with armour under or not. and when i hung myself in a tree upside down in it and ripped the jacket compartment apart, when i got home called ogio canada and they gave me crash replacment(wasnt free but a good deal for something i destroyed) at the store i bought it at !!!!!! ( any other bag would have shredded as well and probably been a pain to get to work again) since riding with mine a couple riding buddies have also converted to the vest way.