The 3-liter Hydrapak reservoir has a slosh-control baffle that separates to allow for easy cleaning and drying. It has a good bite valve with an easy flow, but make sure the pressure-fit hose attachment is sealed securely. One tester accidently pulled the tube out and ended up with a pack full of water.
Wide shoulder straps and a stiff framesheet can handle loads up to 20 pounds, but we wished for a beefier hipbelt for better load transfer.
The roll-top closure opens the packbag wide for easy loading and seals out rain better than the rest. It’s not submersible, but the PU coating on the fabric makes it highly water-resistant. It withstood a 45-minute deluge in Oregon.
Thick foam on the shoulder straps and backpanel cushion big loads, but after a hot dayhike in Joshua Tree National Park, one tester’s back was pretty soaked.