Exped Ultra 6.5R vs Sea to Summit Ether Light XT
Weight and specs compared for 2026 — and which one to choose.
All-season insulated air mat with R-6.9 warmth, 9cm thickness and quiet 20D recycled face fabric; mummy regular.
Ultralight air sleeping pad with 3D construction for comfort.
Building a pack? Add either one to your HikeLoad list, or drop its weight into the base weight calculator, and see what it does to your total weight.
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Exped Ultra 6.5R vs Sea to Summit Ether Light XT: which should you buy?
If saving weight is your priority, the Sea to Summit Ether Light XT wins — at 435 g it is 4 g (1%) lighter than the Exped Ultra 6.5R (439 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.