Arc'teryx Alpha SL Jacket (men's) vs Arc'teryx Zeta SL Jacket

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

Arc'teryx Alpha SL Jacket (men's) is the lighter option — 48 g lighter than the Arc'teryx Zeta SL Jacket (17% less weight). If grams matter to you, that is the one to beat.

Spec	Arc'teryx Alpha SL Jacket (men's)	Arc'teryx Zeta SL Jacket
Weight	227 g · 0.227 kg · 0.50 lb	275 g · 0.275 kg · 0.61 lb
Brand	Arc'teryx	Arc'teryx
Category	Clothing - Outer Layer	Clothing - Outer Layer

Arc'teryx Alpha SL Jacket (men's)

227 g

The lightest GORE-TEX PRO shell in the Arc'teryx range, designed for alpine climbing with helmet-compatible hood and minimalist construction.

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Arc'teryx Zeta SL Jacket

275 g

Ultralight packable Gore-Tex jacket for emergency protection.

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Arc'teryx Alpha SL Jacket (men's) vs Arc'teryx Zeta SL Jacket: which should you buy?

If saving weight is your priority, the Arc'teryx Alpha SL Jacket (men's) wins — at 227 g it is 48 g (17%) lighter than the Arc'teryx Zeta SL Jacket (275 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 clothing - outer layer page, or browse the full gear weight database.

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