Why It's CoolClimbers eschew excess, and so does the Himalayan. Instead of heavy internal framework, Marmot inserts a folding bivy pad that plays three roles: rudimentary framesheet, back-panel padding, and torso-size bedtime cush. Likewise, the hipbelt relies on breadth of breathable fabric rather than thick foam to spread weight over the hipbones. Stay under 40 pounds and the system works nicely. » Side pockets big enough for a Nalgene and fleece, and a three-compartment lidall removableoffer real-world convenience. » Small wand pockets and side compression straps secure your poles. » A climber's front crampon pouch is a perfect place for a hiker's water filter. » Kevlar-reinforced nylon fabric is made to withstand hauls up rock faces.Hmmm . . .The inner bivy-pad sleeve could also hold a hydration bladder, but hose ports are missing.