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these are absolutely miserable. I once did a week in a rab version of this and I wanted to cry everytime I got in. it's basically a non-breathable moderately waterproof coffin.
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I have an outdoor research helium.
It's ok, but tBH the Rab dicks all over it. Lot's of condensation in the OR one. Not once have I woken up in it not damp at the feet, bit of a problem with most bivis TBF, but the rab copes better due to combination of material and the taut design meaning you can keep it off your feet
This is for adventure not racing.
I need a new all weather shelter.