Durston Kakwa 55 (2025) vs ULA Catalyst

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

Both weigh the same at 850 g, so choose on features, price and fit.

Spec	Durston Kakwa 55 (2025)	ULA Catalyst
Weight	850 g · 0.850 kg · 1.87 lb	850 g · 0.850 kg · 1.87 lb
Brand	Durston	ULA
Category	Backpack	Backpack

Durston Kakwa 55 (2025)

850 g

55L ultralight thru-hiking pack in Ultra 200X fabric with tubular aluminum frame, carries up to 20kg comfortably.

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ULA Catalyst

850 g

Versatile 68L semi-frameless pack for loaded trips.

Full details →

Durston Kakwa 55 (2025) vs ULA Catalyst: which should you buy?

On weight these two are identical (850 g), so your decision comes down to features, fit and price. Check the full details and current price for each above.

See where both rank against everything else in this category on the lightest backpack page, or browse the full gear weight database.

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