Icebreaker Merino 200 Oasis Crew Long Sleeve vs Smartwool Merino 250 Crew
Weight and specs compared for 2026 — and which one to choose.
200 g/m² merino wool long-sleeve base layer. Naturally odor-resistant and temperature-regulating for multi-day hiking.
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Icebreaker Merino 200 Oasis Crew Long Sleeve vs Smartwool Merino 250 Crew: which should you buy?
If saving weight is your priority, the Icebreaker Merino 200 Oasis Crew Long Sleeve wins — at 215 g it is 55 g (20%) lighter than the Smartwool Merino 250 Crew (270 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.