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NEMO Tensor Extreme Conditions vs Western Mountaineering AstraLite

Weight and specs compared for 2026 — and which one to choose.

NEMO Tensor Extreme Conditions is the lighter option — 14 g lighter than the Western Mountaineering AstraLite (3% less weight). If grams matter to you, that is the one to beat.
Spec NEMO Tensor Extreme Conditions Western Mountaineering AstraLite
Weight 482 g · 0.482 kg · 1.06 lb 496 g · 0.496 kg · 1.09 lb
Brand NEMO Western Mountaineering
Category Sleep System Sleep System
NEMO Tensor Extreme Conditions
482 g

Four-season insulated air pad delivering an 8.5 R-value at just 17oz. Among the lightest extremely well-insulated backpacking pads. Regular mummy.

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Western Mountaineering AstraLite
496 g

Ultralight 3-season sleeping bag with 850fp down and 12D shell. Designed for fast-and-light alpine pursuits and long trail journeys.

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NEMO Tensor Extreme Conditions vs Western Mountaineering AstraLite: which should you buy?

If saving weight is your priority, the NEMO Tensor Extreme Conditions wins — at 482 g it is 14 g (3%) lighter than the Western Mountaineering AstraLite (496 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 sleep system page, or browse the full gear weight database.

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