Bear Grylls Emergency Bivy vs Black Diamond Oz Screwgate Carabiner
Weight and specs compared for 2026 — and which one to choose.
Tear and puncture-resistant mylar bivy. Only 4 oz for emergency backup shelter.
Full details →Ultralight screwgate carabiner for via ferrata.
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Bear Grylls Emergency Bivy vs Black Diamond Oz Screwgate Carabiner: which should you buy?
If saving weight is your priority, the Black Diamond Oz Screwgate Carabiner wins — at 32 g it is 81 g (72%) lighter than the Bear Grylls Emergency Bivy (113 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.