Durston Gear Kakwa 40 vs Zpacks Super Nero Ultra 50L Backpack

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

Zpacks Super Nero Ultra 50L Backpack is the lighter option — 450 g lighter than the Durston Gear Kakwa 40 (57% less weight). If grams matter to you, that is the one to beat.

Spec	Durston Gear Kakwa 40	Zpacks Super Nero Ultra 50L Backpack
Weight	795 g · 0.795 kg · 1.75 lb	345 g · 0.345 kg · 0.76 lb
Brand	Durston Gear	Zpacks
Category	Backpack	Backpack

Durston Gear Kakwa 40

795 g

Ultralight 40L internal-frame thru-hiking pack in Ultra 200X fabric, with a hollow aluminum U-frame and 15L of external storage.

Check price Full details →

Zpacks Super Nero Ultra 50L Backpack

345 g

Versatile ultralight frameless pack in Dyneema Composite Fabric. Sized for multi-day thru-hiking trips while staying under 350g total weight.

Check price Full details →

Durston Gear Kakwa 40 vs Zpacks Super Nero Ultra 50L Backpack: which should you buy?

If saving weight is your priority, the Zpacks Super Nero Ultra 50L Backpack wins — at 345 g it is 450 g (57%) lighter than the Durston Gear Kakwa 40 (795 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 backpack page, or browse the full gear weight database.

More backpack comparisons

Durston Gear Kakwa 40 vs Gossamer Gear Murmur 36 Hyperlight Backpack Durston Gear Kakwa 40 vs Salomon ADV Skin 12 Durston Gear Kakwa 40 vs Zpacks Nero Classic Ultra Backpack Durston Gear Kakwa 40 vs Zpacks Nero Classic 50L Durston Gear Kakwa 40 vs Zpacks Nero Classic Backpack Durston Gear Kakwa 40 vs Zpacks Nero Classic 40L