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Rab Mythic Ultra 20 vs Western Mountaineering HighLite Sleeping Bag

Weight and specs compared for 2026 — and which one to choose.

Rab Mythic Ultra 20 is the lighter option — 20 g lighter than the Western Mountaineering HighLite Sleeping Bag (4% less weight). If grams matter to you, that is the one to beat.
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Spec Rab Mythic Ultra 20 Western Mountaineering HighLite Sleeping Bag
Weight 440 g · 0.440 kg · 0.97 lb 460 g · 0.460 kg · 1.01 lb
Brand Rab Western Mountaineering
Category Sleep System Sleep System
Rab Mythic Ultra 20
440 g

20-degree sleeping bag weighing 440g. Features TILT lining technology that reflects heat back to achieve superior warmth-to-weight ratio.

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Western Mountaineering HighLite Sleeping Bag
460 g

800-fill goose down sleeping bag rated to 35°F/2°C. Exceptionally light at 460g in 5'6" length, ideal for warm-weather thru-hiking.

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Rab Mythic Ultra 20 vs Western Mountaineering HighLite Sleeping Bag: which should you buy?

If saving weight is your priority, the Rab Mythic Ultra 20 wins — at 440 g it is 20 g (4%) lighter than the Western Mountaineering HighLite Sleeping Bag (460 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.

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