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Osprey Exos 38 vs Osprey Sirrus 36
Weight and specs compared for 2026 — and which one to choose.
Osprey Exos 38 is the lighter option — 30 g lighter than the Osprey Sirrus 36 (2% less weight). If grams matter to you, that is the one to beat.
Osprey Exos 38
1,190 g
Ultralight ventilated multi-day pack with AirSpeed suspended mesh backpanel and removable top lid for fast-and-light backpacking.
Check price Full details →Osprey Exos 38 vs Osprey Sirrus 36: which should you buy?
If saving weight is your priority, the Osprey Exos 38 wins — at 1,190 g it is 30 g (2%) 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.