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This ultralight emergency bivy sack offers the ideal amount of protection for wide range of situations without adding much to your pack—making it the perfect backup shelter.

MSR says:

The diminutive, ultralight and weather-resistant E-Bivy sack can be tossed into a pack lid on any trip, providing essential protection for an unplanned night in the hills, or added warmth and comfort when used under tarps or on open bivies. Its silicone-coated fabric top blocks wind, dew, spindrift and precipitation, making it the perfect emergency shelter.

Our Verdict

MSR’s E-Bivy is MSR’s lightest and most compact, water resistant bivy, now 25% lighter than the previous version. It does exactly what a good bivy should; it offers protection from wind, damp ground surfaces and morning condensation, all without burdening your pack with excess weight. The pack size is excellent too, packing  smaller than a Nalgene bottle so it doesn’t take up valuable room in your pack.

If you’re looking for a minimalist camping shelter you can combine it with a tarp and lightweight sleeping bag to provide a warm and dry nights sleep. It can also be tossed into a pack lid on any trip, providing essential protection for an unplanned night in the hills.

– Reviewed by Ultralight Outdoor Gear

Features

• Ultralight: Ultra-packable & ultralight emergency shelter is easy to take with you.
• Reliable: Durable bivy offers warmth & weather-resistance when you need it
• Protection: Silicone coated fabric top; Xtreme Shield™ waterproof floor.

Specifications

• Weight: 172g (excludes storage bag)
• Capacity: 1 person
• Length: 2.24m (88in)
• Width of top: 0.91m (36in)
• Width of bottom: 0.58m (23in)
• Packed size: 18 x 10cm

Fabrics

• Top: 15D ripstop nylon coated
• Floor: 15 D ripstop nylon 1200mm Xtreme Shield polyurethane & DWR

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