Icebreaker Merino 200 Oasis LS Crewe vs Smartwool Merino 150 Base Layer Top
Weight and specs compared for 2026 — and which one to choose.
Midweight 200g/m2 merino wool long-sleeve base layer. Naturally odor-resistant with flatlock seams and gusseted underarms.
Full details →Lightweight merino wool base layer with excellent moisture management.
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Icebreaker Merino 200 Oasis LS 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 57 g (26%) lighter than the Icebreaker Merino 200 Oasis LS Crewe (220 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.