MSR E-Bivy Ultralight or Emergency Bivy Sack 2011 Version Nylon There is no assist mechanism

There is no assist mechanism — the bearings do the work

Outback Red and Eucalyptus

The total weight of this very compressible package is only 1 lb

Cordura stuff sack

MSR E-Bivy Ultralight or Emergency Bivy Sack 2011 Version Nylon There is no assist mechanismThe diminutive, weather resistant E Bivy sack adds the ideal amount of protection for wide range of situations without adding much to your pack. It will block wind, dew, spindrift and even light precipitation, adding valuable warmth and comfort when used under tarps, on open bivies and for winter camping. It can also be tossed into a pack lid on any trip, providing essential protection for an unplanned night in the hills. Highly Breathable: Increased