← Gear database
Acme Tornado 636 vs SOL Thermal Bivvy
Weight and specs compared for 2026 — and which one to choose.
Acme Tornado 636 is the lighter option — 158 g lighter than the SOL Thermal Bivvy (93% less weight). If grams matter to you, that is the one to beat.
Acme Tornado 636 vs SOL Thermal Bivvy: which should you buy?
If saving weight is your priority, the Acme Tornado 636 wins — at 12 g it is 158 g (93%) lighter than the SOL Thermal Bivvy (170 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.