Rab Mythic Ultra 20 vs Zpacks Summer Quilt
Weight and specs compared for 2026 — and which one to choose.
20-degree sleeping bag weighing 440g. Features TILT lining technology that reflects heat back to achieve superior warmth-to-weight ratio.
Full details →Minimal 8.6-ounce quilt for warm weather camping. Doubles as winter sleeping bag liner.
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Rab Mythic Ultra 20 vs Zpacks Summer Quilt: which should you buy?
If saving weight is your priority, the Zpacks Summer Quilt wins — at 244 g it is 196 g (45%) lighter than the Rab Mythic Ultra 20 (440 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.