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Hyperlite Mountain Gear Pemi 15 Running Vest vs Osprey Stratos 36

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

Hyperlite Mountain Gear Pemi 15 Running Vest is the lighter option — 959 g lighter than the Osprey Stratos 36 (73% less weight). If grams matter to you, that is the one to beat.
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Spec Hyperlite Mountain Gear Pemi 15 Running Vest Osprey Stratos 36
Weight 351 g · 0.351 kg · 0.77 lb 1,310 g · 1.310 kg · 2.89 lb
Brand Hyperlite Mountain Gear Osprey
Category Backpack Backpack
Hyperlite Mountain Gear Pemi 15 Running Vest
351 g

Running vest using ALUULA Graflyte fabric for ultralight trail runners.

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Osprey Stratos 36
1,310 g

Ventilated 36L day and overnight pack with AirSpeed suspension.

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Hyperlite Mountain Gear Pemi 15 Running Vest vs Osprey Stratos 36: which should you buy?

If saving weight is your priority, the Hyperlite Mountain Gear Pemi 15 Running Vest wins — at 351 g it is 959 g (73%) lighter than the Osprey Stratos 36 (1,310 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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