Sea to Summit Ultralight XR Insulated (Short) vs Therm-a-Rest Vesper 20F Quilt
Weight and specs compared for 2026 — and which one to choose.
Ultralight insulated sleeping pad at 13.8 oz (390g) for 66-inch length with 3.6 R-value, lightest inflatable option available.
Full details →Sleeping quilt rated to 20°F (-7°C) filled with 900-fill down, designed for ultralight three-season backpacking. Outstanding warmth-to-weight ratio.
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Sea to Summit Ultralight XR Insulated (Short) vs Therm-a-Rest Vesper 20F Quilt: which should you buy?
If saving weight is your priority, the Sea to Summit Ultralight XR Insulated (Short) wins — at 390 g it is 160 g (29%) lighter than the Therm-a-Rest Vesper 20F Quilt (550 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.