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Therm-a-Rest Z Lite Sol vs Western Mountaineering Versalite 10°F

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

Therm-a-Rest Z Lite Sol is the lighter option — 440 g lighter than the Western Mountaineering Versalite 10°F (52% less weight). If grams matter to you, that is the one to beat.
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Spec Therm-a-Rest Z Lite Sol Western Mountaineering Versalite 10°F
Weight 410 g · 0.410 kg · 0.90 lb 850 g · 0.850 kg · 1.87 lb
Brand Therm-a-Rest Western Mountaineering
Category Sleep System Sleep System
Therm-a-Rest Z Lite Sol
410 g

Classic accordion-fold foam pad. R-value 2.0. Indestructible.

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Western Mountaineering Versalite 10°F
850 g

850-fill down sleeping bag rated to 10°F (-12°C).

Full details →

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Therm-a-Rest Z Lite Sol vs Western Mountaineering Versalite 10°F: which should you buy?

If saving weight is your priority, the Therm-a-Rest Z Lite Sol wins — at 410 g it is 440 g (52%) lighter than the Western Mountaineering Versalite 10°F (850 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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