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NEMO Eclipse All-Season vs Therm-a-Rest Hyperion 20F/-6C (Regular)

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

NEMO Eclipse All-Season is the lighter option — 114 g lighter than the Therm-a-Rest Hyperion 20F/-6C (Regular) (20% less weight). If grams matter to you, that is the one to beat.
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Spec NEMO Eclipse All-Season Therm-a-Rest Hyperion 20F/-6C (Regular)
Weight 453 g · 0.453 kg · 1.00 lb 567 g · 0.567 kg · 1.25 lb
Brand NEMO Therm-a-Rest
Category Sleep System Sleep System
NEMO Eclipse All-Season
453 g

New 2026 sleeping pad combining features from previous winners. Offers 4-inch cushioning with contoured longitudinal baffles for supportive night sleep.

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Therm-a-Rest Hyperion 20F/-6C (Regular)
567 g

Ultralight 20F down mummy bag with 900-fill Nikwax Hydrophobic Down for fast-and-light backpacking.

Full details →

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NEMO Eclipse All-Season vs Therm-a-Rest Hyperion 20F/-6C (Regular): which should you buy?

If saving weight is your priority, the NEMO Eclipse All-Season wins — at 453 g it is 114 g (20%) lighter than the Therm-a-Rest Hyperion 20F/-6C (Regular) (567 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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