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Gregory Optic 48 vs Salomon ADV Skin 20

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

Salomon ADV Skin 20 is the lighter option — 975 g lighter than the Gregory Optic 48 (71% less weight). If grams matter to you, that is the one to beat.
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Spec Gregory Optic 48 Salomon ADV Skin 20
Weight 1,370 g · 1.370 kg · 3.02 lb 395 g · 0.395 kg · 0.87 lb
Brand Gregory Salomon
Category Backpack Backpack
Gregory Optic 48
1,370 g

Lightweight 48L trail pack with suspended mesh back panel.

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Salomon ADV Skin 20
395 g

Lightweight 20L running vest with front flasks included.

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Gregory Optic 48 vs Salomon ADV Skin 20: which should you buy?

If saving weight is your priority, the Salomon ADV Skin 20 wins — at 395 g it is 975 g (71%) lighter than the Gregory Optic 48 (1,370 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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