← Gear database
Osprey Sirrus 36 vs Zpacks Nero Classic
Weight and specs compared for 2026 — and which one to choose.
Zpacks Nero Classic is the lighter option — 919 g lighter than the Osprey Sirrus 36 (75% less weight). If grams matter to you, that is the one to beat.
Zpacks Nero Classic
301 g
Minimalist frameless DCF daypack ideal for ultralight hikers keeping baseweight under 10 lbs. Features roll-top closure and water-resistant Dyneema construction...
Check price Full details →Osprey Sirrus 36 vs Zpacks Nero Classic: which should you buy?
If saving weight is your priority, the Zpacks Nero Classic wins — at 301 g it is 919 g (75%) lighter than the Osprey Sirrus 36 (1,220 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.