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Osprey Atmos AG 65 vs Zpacks Nero Classic 30L

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

Zpacks Nero Classic 30L is the lighter option — 1,879 g lighter than the Osprey Atmos AG 65 (86% less weight). If grams matter to you, that is the one to beat.
Spec Osprey Atmos AG 65 Zpacks Nero Classic 30L
Weight 2,180 g · 2.180 kg · 4.81 lb 301 g · 0.301 kg · 0.66 lb
Brand Osprey Zpacks
Category Backpack Backpack
Osprey Atmos AG 65
2,180 g

Full-featured 65L pack with Anti-Gravity suspension. Ideal for extended trips.

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Zpacks Nero Classic 30L
301 g

Frameless ultralight backpack built with durable Ultra 100X fabric. Minimalist design for long-distance hikers prioritizing minimum pack weight.

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Osprey Atmos AG 65 vs Zpacks Nero Classic 30L: which should you buy?

If saving weight is your priority, the Zpacks Nero Classic 30L wins — at 301 g it is 1,879 g (86%) lighter than the Osprey Atmos AG 65 (2,180 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.

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