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Thread the 8mm pole through a duct in the head section of the bivi, a bit like putting up a dome tent. Overall, the Sierra Designs Backcountry Bivy is a great quality, lightweight bivvy bag which simply does not leak and is extremely breathable.
Our answer is “when it uses two fibre glass poles rather than one or a separate fly sheet”, but no it doesn’t matter. It has a lot of stray dogs, which I anticipate having to fend off not infrequently with pepper spray in the middle of the night if I am sleeping in the Oex Bush Pro. When there's a breeze, you can set it up so there's plenty of venting, or leave the porch side wide open.
all in all though, would thoroughly recommend to anyone who likes to camp a little more minimalistic than bringing a tent. GO Outdoors - NEW for 2019: OEX Bush Pro Bivvi - part of the new OEX range ideal for low weight nights outdoors. The best bivi bags can be much more lightweight and compact than the most expensive one-person tents, and as such are often favoured for a quick overnighter, especially in the summer months.
I am actually not that experienced with how to approach airing a tent in a cramped urban hostel, maybe there is some practical advice you can give. In good weather, the hood can be withdrawn and toggled up on the hoop, leaving a net mesh to keep bugs out.The two hoops are formed by simple flexi DAC aluminium rods – these are exceptionally good poles and we really like to see them on the Ionosphere.