Arc'teryx Alpha SL Jacket vs Black Diamond Fineline Stretch Shell
Weight and specs compared for 2026 — and which one to choose.
4-way stretch waterproof shell at 11.3 oz (320g) for men, featuring stretchy fabric for climbing and technical movement.
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Arc'teryx Alpha SL Jacket vs Black Diamond Fineline Stretch Shell: which should you buy?
If saving weight is your priority, the Arc'teryx Alpha SL Jacket wins — at 280 g it is 40 g (13%) lighter than the Black Diamond Fineline Stretch Shell (320 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.