Platypus duthie am 12 all mountain hydration pack description just like youd expect from an all mountain pack the duthie am 12 does it all nine liters of gear storage and a 3 liter big zip sl reservoir easily handle just about anything you could pull off in a day an external stuff pocket offers quick access and stash ability while compression straps carry body armor or let you shrink the pack down for shorter rides features 30l big zip sl reservoir hydration pocket with res