I boght an outdoor water pak and replaced the bladder with a camel back bladder for the HUGE opening and the big mouth bite valve...those two things the outdoor products bladder had I didnt like and it was an easy fix and the pack part has a ton of storage like a back pack. I hardly ever use that pack anymore though as I most often use a camel back classic with no storage since the loaded pack hurt my back when racing motorcycles offroad so I switched to a lighter water pack mentioned above and put all my tools and stuff in a tool kit pack for the waste...plus i have no chance of being harpooned the way the tools are layed out in my pack now whereas with the tool in the camel bak it could happen.