Black Diamond Twilight Bivy

Priced: $149.90 - $149.95 Rated:   - 5 stars out of 5 by 3 reviews.
Black Diamond Twilight Bivy
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Color: Wasabi
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Black Diamond Twilight Bivy - Black Diamond Twilight Bivy Sack - The minimalist, four-season Black Diamond Twilight bivy sack is ideal for an overnight shelter or as a sleeping bag cover. Water-resistant and breathable NanoShield fabric and a frameless construction keeps weight to an absolute minimum and packs down incredibly small. Built with a zippered entry across the shoulders, the Twilight is easy to get into and use while sitting up. Get year-round performance in a minimalist setup with the Black Diamong Twilight bivy sack.


  • Small size fits easily into a backpack, bike pack, or haul bag


  • New proprietary NanoShield single-wall fabric
  • Frameless construction


  • Mesh panel over face keeps out bugs, helps cut down on condensation buildup, and is removable

Weather and Wind:

  • Breathable, abrasion-resistant, and highly packable NanoShield fabric features a silicone NanoCell coating to protect against rain, snow, and wind


  • Zippered entry at the shoulder


  • Frameless contruction to minimize weight
  • 10.7 oz.
  • 82”L x 33”W (18.74 sq. feet)
  • Optional footprint sold separately
  • Single-wall bivy design saves weight by eliminating the need for a tent canopy, poles, and fly; ideal for year-round minimalist applications
  • 4-season use
When the wind and rain start to blow during your solo mission, reach into your pack, and pull out the super-compact and lightweight Black Diamond Twilight Bivy. The water-resistant NanoShield fabric seals out the elements as it surrounds your sleeping bag and breathes better than virtually any water-phobic fabric on the market. A zippered opening at the shoulders provides easy access and lets you sit up to stretch your aching muscles in the middle of the night.


Minimalist bivy with NanoShield shell and mesh panel at the zipper entry.

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Packed Size:8”D x 13”L
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Black Diamond Twilight Bivy Reviews:


I use this bivy for backpacking and car camping. It is extremely compact if compressed a little it's a little bigger than a baseball, light, and breathable. It's not entirely waterproof but will keep you dry from light rain and morning dew, it does a good job keeping the wind off as well. I usually pair it with a light weight tarp in heavier rain and snow. It's pretty spacious, I'm 5'8, 165lbs and I have tons of space to move around and enough room for my boots and clothes if needed. There are loops that you can easily tie up the cloth around the face area to keep it elevated but the material is so light I barely notice it when I sleep. Over this is an awesome bivy.

rpa4777717 at on 09/11/2011

I bought this bivy for lightweight alpine use and for use in emergencies. In all my research this bivy had the best balance of weight, breathability, and weather resistance.
I have used this bivy climbing Longs Peak and car camping. I have not encountered any real weather with this bivy so I can't testify to its waterproofness, but I can tell you that it breaths very well.

northfacejmb at on 09/15/2010
I got this bivy never expecting to use it, then on an overnight night hike it started to hail and snow. This bivy made my night a 100 times better by keeping me dry and warm in my sleeping bag.
Jason P at on 03/09/2011