Icebreaker Merino 200 Oasis Long Sleeve Crew vs Smartwool Merino 250 Crew

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

Smartwool Merino 250 Crew is the lighter option — 67 g lighter than the Icebreaker Merino 200 Oasis Long Sleeve Crew (20% less weight). If grams matter to you, that is the one to beat.

Spec	Icebreaker Merino 200 Oasis Long Sleeve Crew	Smartwool Merino 250 Crew
Weight	337 g · 0.337 kg · 0.74 lb	270 g · 0.270 kg · 0.60 lb
Brand	Icebreaker	Smartwool
Category	Clothing - Base Layer	Clothing - Base Layer

Icebreaker Merino 200 Oasis Long Sleeve Crew

337 g

Midweight 200gsm 100% merino wool base layer top with natural odor resistance and temperature regulation.

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Smartwool Merino 250 Crew

270 g

Midweight merino base layer for cold-weather hiking.

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Icebreaker Merino 200 Oasis Long Sleeve Crew vs Smartwool Merino 250 Crew: which should you buy?

If saving weight is your priority, the Smartwool Merino 250 Crew wins — at 270 g it is 67 g (20%) lighter than the Icebreaker Merino 200 Oasis Long Sleeve Crew (337 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.

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