Big Wall Bivy
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Black Diamond - Big Wall Bivy

Black Diamond's Big Wall Bivy is a super light, hooped bivy designed for climbers. Bibler's hoop is a Delrin rod sewn into the sack, so there is nothing to set up and no parts to lose. Made of the same waterproof and breathable ToddTex laminate as used in all Bibler Tents, these bivy sacks collect less condensation than any other bivy bag sold in the U.S. All of the seams are factory seam taped. The floor is coated nylon taffeta, with a slightly tapered foot section for efficiency.
Both the foot and head ends of the bivy are boxed, so they won't cramp your toes or compress sleeping bag loft. The double storm flap and rain gutter have no sewn seams, so they can't leak. The dual slider zipper opens in the middle for adjustable ventilation and the opening is also covered by zippered no-see-um mosquito netting.
At 26 ounces, this durable, stormproof shelter is ideal insurance for that wall or alpine bivy. The Big Wall Bivy has a waterproof, welded, fabric-covered Spectra® runner sewn in the side for tie-ins. Comes with a stuff sack. Completely factory seam taped.

Technical specifications & features

Weight Average Packed Weight: [870 g, (1 lb 14 oz)
Minimum Weight: 740 g (1 lb 10 oz)
Color Yellow
Tent Sleeps 1 Person
Number of Doors 1 Door
Length 251 cm (99 in)
Width 89 cm (35 in)
Tent Pole Type 1 Delrin rod
Material Floor 70 Denier Nylon Taffeta.Toddtex trilaminate waterproof breathable fabric.
Other Features Built with waterproof, breathable ToddTex
Waterproof Spectra® runner tie-in loop
Foot and head sections boxed for extra room

Product Reviews

Plenty of room for a pack and moveability
I bought the 'long', and there's more than enough room for my 6'3" long body and 20" shoulder width. I can even fit my 90L pack up above my head for a pillow and still fit my boots below me to dry out at night.
The built-in wire is a plus, since you don't have to worry about losing or breaking any additional poles.
The only downside is floor doesn't feel nearly as durable/thick as the OutdoorResearch Advanced Bivy which feels much more like a 'bathtub' floor lining. Yet, this hasn't been an issue since the floor has still be waterproof enough to sleep on snow without any residual water buildup (beside respiratory condensation).
It's definitely a worthwhile, high quality, 4-season bivy. Review by sratchf2

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