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Outdoor Research

Helium Bivy



Utilising the pole structure of Outdoor Research's popular Highland Bivy, the Helium Bivy gives you the comfort of all the head room but sheds the grams thanks to the ultra-light... Read more

Questions & Answers

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  • What is the Hydrostatic head of the shelter?


    Thanks for the question. The OR Helium Bivy uses PERTEX Shield+ 2.5L fabric which has a 20,000mm waterhead rating and breathability rating of 20,000 g/m²/24hr . 
    I hope that helps but if you need anything further please don't hesitate to get in touch direct at web@mountainequipment.com and I'll do my best. 

    Kind Regards,

    Matt Eaton


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