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Gossamer Gear Murmur 36 Hyperlight Backpack vs Osprey Sirrus 36

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

Gossamer Gear Murmur 36 Hyperlight Backpack is the lighter option — 995 g lighter than the Osprey Sirrus 36 (82% less weight). If grams matter to you, that is the one to beat.
Spec Gossamer Gear Murmur 36 Hyperlight Backpack Osprey Sirrus 36
Weight 225 g · 0.225 kg · 0.50 lb 1,220 g · 1.220 kg · 2.69 lb
Brand Gossamer Gear Osprey
Category Backpack Backpack
Gossamer Gear Murmur 36 Hyperlight Backpack
225 g

Frameless 36L hyperlight thru-hiking pack made from ALUULA Graflyte fabric, with roll-top closure and included torso pad.

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Osprey Sirrus 36
1,220 g

Women's ventilated 36L pack with AirSpeed back panel.

Full details →

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Gossamer Gear Murmur 36 Hyperlight Backpack vs Osprey Sirrus 36: which should you buy?

If saving weight is your priority, the Gossamer Gear Murmur 36 Hyperlight Backpack wins — at 225 g it is 995 g (82%) 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.

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