Bear Grylls Emergency Bivy vs Ortovox Bivy Ultralight
Weight and specs compared for 2026 — and which one to choose.
Tear and puncture-resistant mylar bivy. Only 4 oz for emergency backup shelter.
Lightweight emergency shelter at only 7 oz. Insurance against unexpected weather conditions.
Building a pack? Add either one to your HikeLoad list, or drop its weight into the base weight calculator, and see what it does to your total weight.
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Bear Grylls Emergency Bivy vs Ortovox Bivy Ultralight: which should you buy?
If saving weight is your priority, the Bear Grylls Emergency Bivy wins — at 113 g it is 85 g (43%) lighter than the Ortovox Bivy Ultralight (198 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.
See where both rank against everything else in this category on the lightest safety page, or browse the full gear weight database.