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Mountain Hardwear Rock Sack Bivy

Mountain Hardwear Rock Sack Bivy description

The Mountain Hardwear Rock Sack Bivy is an ideal ultralight shelter for alpine and big-wall climbing. Small ledges in the mountains give you few options for setting up your shelter. With the Rock Sack Bivy, all you need is enough room to lay down. This pole-less shelter is made of ultralight Gore-Tex PacLite and weighs only 1lb 2oz. Two small zippered ports at the waist allow you to be tied in at either side, so you don't roll off your ledge at night. This Mountain Hardwear bivy sack also has a UVX window on the hood to keep the inside a little brighter and let you check the weather without opening your shelter.

Bottom Line: At only 1lb 2oz, the Mountain Hardwear Rock Sack Bivy weighs less than most jackets and lets you stay tied in at bivys.

It's too small. I'm too big. Fresh air is about 18 inches away from your mouth. The only gear purchase I regret. I went with DIY replacement and am now much happier as I sleep in bivvy sack in a snow trench beneath a pyramid tarp in winter and feel bombprooof.

This Bivy is fine if you don't want to use it on day-to-day basis. The hood is kind of narrow to get in (guess it is really waterproof for that). It is difficult to enter with a bulky sleeping bag and once inside you don't have a lot of space to close the sleeping bag and adjust the cords. It might be alright during the summer with a smaller sleeping bag - I haven't tested that yet. How ever I am not impressed with it during winter trips.