For done-in-a-day summit plans that go sideways. The BD Twilight Bivy Sack offers a minimalist option for emergency overnights. It also makes a good sleeping bag cover if you're planning to rest under a tarp shelter or inside a snow cave. The silicone Nanocell coating is water resistant and breathable, while keeping the fabric extremely lightweight, soft and packable.
- Made of single-layer NanoShield nylon with a silicone coating that's breathable and resists wetting out
- Frameless construction keeps it lightweight
- Across-shoulder zip allows easy entry and exit, and lets you sit up to eat or read
- Mesh panel across opening allows ventilation
