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Valley and Peak

J Zip Ultra Bivy (all mesh)


The Ultra Bivy J Zip is a Unique Design Which Allows The User Easy Access In and Out. The Ultra Bivy is Suitable for Use Under Tarps or Replacing the Inner Tent on Many Backpacking Tents and Shelters to save Weight and Increase Room within the Tent or Shelter. Will Fit Most Users up to 188 cm (6'2) in Height. Custom Length Option Available On Request.


The Ultra Bivy J Zip is a unique design which allows the user easy access in and  out of the Ultra Bivy.  This version of the Ultra Bivy features an all mesh body for maximum breathability. The floor of The Ultra Bivy is made from Silpoly with a Hydrostatic Head (waterproof rating) of 5300 mm.  

The Ultra Bivy is suitable for use under tarps or replacing the inner tent on many backpacking tents and shelters to save weight and increase room within the tent or shelter.  Will fit most users up to 188 cm (6'2) in height. Custom Length options are available on request.

Approximate Lead Times 

Currently around 3-4 weeks.

 Standard Features include

  • 3 hanging loops, mitten hooks and 3mm shock cord to suspend Ultra Bivy from shelter or tent.

  • 4 pegs/stake out loops

  • #3 YKK  Full J zip. for easy entry and exit

  • Breathable  mesh

  • Comes with Shock cord, clips and stuff sack

  • Fits standard and long sleeping mats/pads including winter versions.


  • 1 or 2 'J Zips' either right or left or both sides.

  • Lightweight solid fabric Add-on Hood which integrates with the Ultra Bivy wrapping around the head end mesh area to give extra protection from cold draughts while maintaining breathability. Weighs 44g. 


  • Mesh head / fabric version is available


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Valley and peak

We Manufacture and Supply Ultralight Outdoor Gear. We Manufacture in the UK, Backpacking Quilts, Ultralight Bivys, Groundsheets and a wide range of UL Specialist Accessories.

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