Therm-a-Rest NeoAir UberLite vs Zpacks Classic Sleeping Bag 20F

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

Therm-a-Rest NeoAir UberLite is the lighter option — 97 g lighter than the Zpacks Classic Sleeping Bag 20F (28% less weight). If grams matter to you, that is the one to beat.

Spec	Therm-a-Rest NeoAir UberLite	Zpacks Classic Sleeping Bag 20F
Weight	250 g · 0.250 kg · 0.55 lb	347 g · 0.347 kg · 0.77 lb
Brand	Therm-a-Rest	Zpacks
Category	Sleep System	Sleep System

Therm-a-Rest NeoAir UberLite

250 g

Lightest NeoAir pad. R-value 2.0 for warm conditions.

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Zpacks Classic Sleeping Bag 20F

347 g

Mummy-style sleeping bag rated to 20F (-7C) with 900-fill goose down. DCF outer shell for low weight and packability. Water-resistant treatment included.

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Therm-a-Rest NeoAir UberLite vs Zpacks Classic Sleeping Bag 20F: which should you buy?

If saving weight is your priority, the Therm-a-Rest NeoAir UberLite wins — at 250 g it is 97 g (28%) lighter than the Zpacks Classic Sleeping Bag 20F (347 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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