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

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

Icebreaker 150 Zone Long Sleeve is the lighter option — 5 g lighter than the Arc'teryx Rho LT Crew (3% less weight). If grams matter to you, that is the one to beat.

Spec	Arc'teryx Rho LT Crew	Icebreaker 150 Zone Long Sleeve
Weight	155 g · 0.155 kg · 0.34 lb	150 g · 0.150 kg · 0.33 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

150 g

Ultralight merino base layer for high-output activities.

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

If saving weight is your priority, the Icebreaker 150 Zone Long Sleeve wins — at 150 g it is 5 g (3%) lighter than the Arc'teryx Rho LT Crew (155 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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