ACR Electronics Bivy Stick vs Petzl Sm'D Twist-Lock Carabiner
Weight and specs compared for 2026 — and which one to choose.
Compact two-way satellite communicator with SOS, GPS tracking and app-based messaging over the global Iridium network.
Full details →Lightweight aluminum D-shaped locking carabiner with twist-lock gate, 23 kN major axis, certified CE EN 12275 and UIAA.
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ACR Electronics Bivy Stick vs Petzl Sm'D Twist-Lock Carabiner: which should you buy?
If saving weight is your priority, the Petzl Sm'D Twist-Lock Carabiner wins — at 51 g it is 49 g (49%) lighter than the ACR Electronics Bivy Stick (100 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.