Nemo Tensor Ultralight vs Western Mountaineering AstraLite

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

Nemo Tensor Ultralight is the lighter option — 156 g lighter than the Western Mountaineering AstraLite (31% less weight). If grams matter to you, that is the one to beat.

Spec	Nemo Tensor Ultralight	Western Mountaineering AstraLite
Weight	340 g · 0.340 kg · 0.75 lb	496 g · 0.496 kg · 1.09 lb
Brand	Nemo	Western Mountaineering
Category	Sleep System	Sleep System

Nemo Tensor Ultralight

340 g

Ultralight inflatable pad with minimal noise. R-value 3.5.

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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 Ultralight vs Western Mountaineering AstraLite: which should you buy?

If saving weight is your priority, the Nemo Tensor Ultralight wins — at 340 g it is 156 g (31%) 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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