Big Agnes Rapide SL Insulated vs Rab Mythic Ultra 360 (22°F)
Weight and specs compared for 2026 — and which one to choose.
Insulated air sleeping pad (regular) with 4.2 R-value, 3.25in thickness and quilted top baffles for stable, warm backcountry comfort.
Full details →Spring/fall sleeping bag at 21.4 oz (606g) with 900-fill hydrophobic European goose down and integrated thermal liner technology.
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Big Agnes Rapide SL Insulated vs Rab Mythic Ultra 360 (22°F): which should you buy?
If saving weight is your priority, the Big Agnes Rapide SL Insulated wins — at 540 g it is 66 g (11%) lighter than the Rab Mythic Ultra 360 (22°F) (606 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.