Arc'teryx Rho LT Crew vs Icebreaker 150 Zone Long Sleeve Crewe

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

Arc'teryx Rho LT Crew is the lighter option — 119 g lighter than the Icebreaker 150 Zone Long Sleeve Crewe (43% less weight). If grams matter to you, that is the one to beat.

Spec	Arc'teryx Rho LT Crew	Icebreaker 150 Zone Long Sleeve Crewe
Weight	155 g · 0.155 kg · 0.34 lb	274 g · 0.274 kg · 0.60 lb
Brand	Arc'teryx	Icebreaker
Category	Clothing - Base Layer	Clothing - Base Layer

Arc'teryx Rho LT Crew

155 g

Lightweight Phasic base layer for cool and active conditions.

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Icebreaker 150 Zone Long Sleeve Crewe

274 g

Ultralight 150gsm merino wool baselayer with mesh underarm zones for breathability. Naturally odor-resistant. Ideal for active multi-day hiking.

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Arc'teryx Rho LT Crew vs Icebreaker 150 Zone Long Sleeve Crewe: which should you buy?

If saving weight is your priority, the Arc'teryx Rho LT Crew wins — at 155 g it is 119 g (43%) 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.

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