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Forclaz Trek MT900 5°C Down vs Katabatic Gear Alsek 22°F

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

Katabatic Gear Alsek 22°F is the lighter option — 376 g lighter than the Forclaz Trek MT900 5°C Down (45% less weight). If grams matter to you, that is the one to beat.
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Spec Forclaz Trek MT900 5°C Down Katabatic Gear Alsek 22°F
Weight 830 g · 0.830 kg · 1.83 lb 454 g · 0.454 kg · 1.00 lb
Brand Forclaz Katabatic Gear
Category Sleep System Sleep System
Forclaz Trek MT900 5°C Down
830 g

700 fill power RDS down mummy-style sleeping bag with 90% duck down. Ideal for 3-season trekking with anatomical hood and adjustable footbox. 5°C comfort rating...

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Katabatic Gear Alsek 22°F
454 g

Premium 850-fill down sleeping quilt rated to 22°F.

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Forclaz Trek MT900 5°C Down vs Katabatic Gear Alsek 22°F: which should you buy?

If saving weight is your priority, the Katabatic Gear Alsek 22°F wins — at 454 g it is 376 g (45%) lighter than the Forclaz Trek MT900 5°C Down (830 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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