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Exped SynMat HL Winter vs Sea to Summit Ultralight XR Insulated (Short)

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

Sea to Summit Ultralight XR Insulated (Short) is the lighter option — 290 g lighter than the Exped SynMat HL Winter (43% less weight). If grams matter to you, that is the one to beat.
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Spec Exped SynMat HL Winter Sea to Summit Ultralight XR Insulated (Short)
Weight 680 g · 0.680 kg · 1.50 lb 390 g · 0.390 kg · 0.86 lb
Brand Exped Sea to Summit
Category Sleep System Sleep System
Exped SynMat HL Winter
680 g

4-season inflatable pad with R-value 8.0.

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Sea to Summit Ultralight XR Insulated (Short)
390 g

Ultralight insulated sleeping pad at 13.8 oz (390g) for 66-inch length with 3.6 R-value, lightest inflatable option available.

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Exped SynMat HL Winter vs Sea to Summit Ultralight XR Insulated (Short): which should you buy?

If saving weight is your priority, the Sea to Summit Ultralight XR Insulated (Short) wins — at 390 g it is 290 g (43%) lighter than the Exped SynMat HL Winter (680 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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