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Therm-a-Rest NeoAir XTherm NXT vs Zpacks Zip Around Sleeping Bag

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

Therm-a-Rest NeoAir XTherm NXT is the lighter option — 182 g lighter than the Zpacks Zip Around Sleeping Bag (30% less weight). If grams matter to you, that is the one to beat.
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Spec Therm-a-Rest NeoAir XTherm NXT Zpacks Zip Around Sleeping Bag
Weight 430 g · 0.430 kg · 0.95 lb 612 g · 0.612 kg · 1.35 lb
Brand Therm-a-Rest Zpacks
Category Sleep System Sleep System
Therm-a-Rest NeoAir XTherm NXT
430 g

4-season inflatable sleeping pad with R-value 7.3.

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Zpacks Zip Around Sleeping Bag
612 g

900-fill-power down sleeping bag with unique side-entry zipper. Eliminates the draft collar for a cleaner, lighter design.

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Therm-a-Rest NeoAir XTherm NXT vs Zpacks Zip Around Sleeping Bag: which should you buy?

If saving weight is your priority, the Therm-a-Rest NeoAir XTherm NXT wins — at 430 g it is 182 g (30%) lighter than the Zpacks Zip Around Sleeping Bag (612 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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