Katabatic Gear Sawatch 15 vs Western Mountaineering Ultralite 20°F

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

Western Mountaineering Ultralite 20°F is the lighter option — 20 g lighter than the Katabatic Gear Sawatch 15 (3% less weight). If grams matter to you, that is the one to beat.

Spec	Katabatic Gear Sawatch 15	Western Mountaineering Ultralite 20°F
Weight	700 g · 0.700 kg · 1.54 lb	680 g · 0.680 kg · 1.50 lb
Brand	Katabatic Gear	Western Mountaineering
Category	Sleep System	Sleep System

Katabatic Gear Sawatch 15

700 g

15F down quilt with 900+ fill power and a Pertex Quantum shell, packing down to roughly 7 liters for cold-weather trips.

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Western Mountaineering Ultralite 20°F

680 g

Premium 850-fill down sleeping bag rated to 20°F (-7°C).

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Katabatic Gear Sawatch 15 vs Western Mountaineering Ultralite 20°F: which should you buy?

If saving weight is your priority, the Western Mountaineering Ultralite 20°F wins — at 680 g it is 20 g (3%) lighter than the Katabatic Gear Sawatch 15 (700 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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