Icebreaker 260 Tech Long Sleeve vs Smartwool Merino 250 Crew

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

Icebreaker 260 Tech Long Sleeve is the lighter option — 40 g lighter than the Smartwool Merino 250 Crew (15% less weight). If grams matter to you, that is the one to beat.

Spec	Icebreaker 260 Tech Long Sleeve	Smartwool Merino 250 Crew
Weight	230 g · 0.230 kg · 0.51 lb	270 g · 0.270 kg · 0.60 lb
Brand	Icebreaker	Smartwool
Category	Clothing - Base Layer	Clothing - Base Layer

Icebreaker 260 Tech Long Sleeve

230 g

Midweight merino base layer for cold conditions.

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Smartwool Merino 250 Crew

270 g

Midweight merino base layer for cold-weather hiking.

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Icebreaker 260 Tech Long Sleeve vs Smartwool Merino 250 Crew: which should you buy?

If saving weight is your priority, the Icebreaker 260 Tech Long Sleeve wins — at 230 g it is 40 g (15%) 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.

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