Exped Ultra 6.5R Sleeping Pad (Medium Mummy) vs Sea to Summit Spark Pro Down 30
Weight and specs compared for 2026 — and which one to choose.
Lightweight insulated sleeping pad with leading weight-to-warmth ratio. Medium mummy size, 340g, perfect for all-season ultralight backpacking
Full details →Ultralight mummy bag rated to 30F (-1C) with 950+ fill-power Ultra-Dry Down. 10-denier shell, shoulder and footbox zippers for temperature control.
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Exped Ultra 6.5R Sleeping Pad (Medium Mummy) vs Sea to Summit Spark Pro Down 30: which should you buy?
If saving weight is your priority, the Exped Ultra 6.5R Sleeping Pad (Medium Mummy) wins — at 340 g it is 279 g (45%) lighter than the Sea to Summit Spark Pro Down 30 (619 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.