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Gregory Facet 55 vs Hyperlite Mountain Gear Pemi 15 Running Vest

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

Hyperlite Mountain Gear Pemi 15 Running Vest is the lighter option — 1,139 g lighter than the Gregory Facet 55 (76% less weight). If grams matter to you, that is the one to beat.
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Spec Gregory Facet 55 Hyperlite Mountain Gear Pemi 15 Running Vest
Weight 1,490 g · 1.490 kg · 3.28 lb 351 g · 0.351 kg · 0.77 lb
Brand Gregory Hyperlite Mountain Gear
Category Backpack Backpack
Gregory Facet 55
1,490 g

Women's 55L lightweight pack with AeroFloat suspension.

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Hyperlite Mountain Gear Pemi 15 Running Vest
351 g

Running vest using ALUULA Graflyte fabric for ultralight trail runners.

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Gregory Facet 55 vs Hyperlite Mountain Gear Pemi 15 Running Vest: which should you buy?

If saving weight is your priority, the Hyperlite Mountain Gear Pemi 15 Running Vest wins — at 351 g it is 1,139 g (76%) lighter than the Gregory Facet 55 (1,490 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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