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Nemo Equipment Tensor Elite Ultralight vs Sea to Summit Spark Pro Down Sleeping Bag

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

Nemo Equipment Tensor Elite Ultralight is the lighter option — 550 g lighter than the Sea to Summit Spark Pro Down Sleeping Bag (72% less weight). If grams matter to you, that is the one to beat.
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Spec Nemo Equipment Tensor Elite Ultralight Sea to Summit Spark Pro Down Sleeping Bag
Weight 215 g · 0.215 kg · 0.47 lb 765 g · 0.765 kg · 1.69 lb
Brand Nemo Equipment Sea to Summit
Category Sleep System Sleep System
Nemo Equipment Tensor Elite Ultralight
215 g

Lightest inflatable pad at 7.6oz with R-value 2.4. Ultra-compact packed size.

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Sea to Summit Spark Pro Down Sleeping Bag
765 g

Ultralight down sleeping bag at 765g with 900+ fillpower RDS-certified down, 15°F rating and Free-Flow Zip system for versatility.

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Nemo Equipment Tensor Elite Ultralight vs Sea to Summit Spark Pro Down Sleeping Bag: which should you buy?

If saving weight is your priority, the Nemo Equipment Tensor Elite Ultralight wins — at 215 g it is 550 g (72%) lighter than the Sea to Summit Spark Pro Down Sleeping Bag (765 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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