Icebreaker 150 Zone Long Sleeve Crewe vs Smartwool Merino 150 Base Layer Top
Weight and specs compared for 2026 — and which one to choose.
Ultralight 150gsm merino wool baselayer with mesh underarm zones for breathability. Naturally odor-resistant. Ideal for active multi-day hiking.
Full details →Lightweight merino wool base layer with excellent moisture management.
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Icebreaker 150 Zone Long Sleeve Crewe vs Smartwool Merino 150 Base Layer Top: which should you buy?
If saving weight is your priority, the Smartwool Merino 150 Base Layer Top wins — at 163 g it is 111 g (41%) lighter than the Icebreaker 150 Zone Long Sleeve Crewe (274 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 - base layer page, or browse the full gear weight database.