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Black Diamond

Black Diamond Twilight Bivy


The Black Diamond Twilight Bivy is a super light, minimalist bivy bag, ideal for use as an emergency shelter or as a sleeping bag cover when moving fast and light. 

Built from BD's proprietary water resistant and breathable NanoShield fabric, the Black Diamond Twilight Bivy bag's weight has been kept to an absolute minimum and packs down incredibly small. Featuring a zippered entry across the shoulders, it is easy to get into and use whilst sitting up.


Superlight Series tent canopies and bivys are constructed with NanoShield—Black Diamond’s proprietary breathable single-layer fabric. NanoShield is extremely water-resistant boasting the highest water column rating of any breathable, single-layer fabric. This is thanks to our exclusive Silicone Nanocell coating, which allows the fabric to remain light, soft and packable.


  • Frameless construction to minimise weight
  • Proprietary NanoShield single-wall fabric
  • Year-round performance
  • Super breathable


  • Season : 4
  • Packed Weight : 302 g
  • Minimum Weight : 290 g
  • Dimensions : 208 x 84 cm
  • Area : 1.75 m2 (18.75 sq ft)
  • Packed Size : 8 x 13 cm (3 x 5 in)

Rock+Run Sleeping Bags

Ethically sourced Polish goose and duck down, combined with lightweight technical fabrics for exceptional warmth, weight and durability.