Exped Ultra 6.5R Sleeping Pad (Medium Mummy) vs Western Mountaineering AlpinLite 20
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 →Roomy 20F mummy bag with 850+ goose down and continuous baffles, balancing warmth, comfort and low weight.
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Exped Ultra 6.5R Sleeping Pad (Medium Mummy) vs Western Mountaineering AlpinLite 20: 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 539 g (61%) lighter than the Western Mountaineering AlpinLite 20 (879 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.