MSR
E-Bivy
Compact, Solo Emergency Shelter
This ultra-compact and lightweight bivy sack offers versatile protection in any season. Like the MSR E-Wing, its factory compressed to the size if a soda can so you can carry it along as an emergency shelter. Once deployed, the stuff sack expands for easy packing so you can use it as your primary shelter on everything from alpine-style winter ascents to high-mileage backpacks.