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3F UL Gear Qidian Pro 46+10L vs Osprey Sirrus 36

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

3F UL Gear Qidian Pro 46+10L is the lighter option — 340 g lighter than the Osprey Sirrus 36 (28% less weight). If grams matter to you, that is the one to beat.
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Spec 3F UL Gear Qidian Pro 46+10L Osprey Sirrus 36
Weight 880 g · 0.880 kg · 1.94 lb 1,220 g · 1.220 kg · 2.69 lb
Brand 3F UL Gear Osprey
Category Backpack Backpack
3F UL Gear Qidian Pro 46+10L
880 g

UHMWPE blended nylon ultralight backpack with 46L main and 10L external compartment. Fits users 160-190cm with torso 15-18 inches.

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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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3F UL Gear Qidian Pro 46+10L vs Osprey Sirrus 36: which should you buy?

If saving weight is your priority, the 3F UL Gear Qidian Pro 46+10L wins — at 880 g it is 340 g (28%) 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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