Arc'teryx Rho LT Crew vs Icebreaker Merino 200 Oasis Crew Long Sleeve

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

Arc'teryx Rho LT Crew is the lighter option — 60 g lighter than the Icebreaker Merino 200 Oasis Crew Long Sleeve (28% less weight). If grams matter to you, that is the one to beat.

Spec	Arc'teryx Rho LT Crew	Icebreaker Merino 200 Oasis Crew Long Sleeve
Weight	155 g · 0.155 kg · 0.34 lb	215 g · 0.215 kg · 0.47 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 Merino 200 Oasis Crew Long Sleeve

215 g

200 g/m² merino wool long-sleeve base layer. Naturally odor-resistant and temperature-regulating for multi-day hiking.

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Arc'teryx Rho LT Crew vs Icebreaker Merino 200 Oasis Crew Long Sleeve: which should you buy?

If saving weight is your priority, the Arc'teryx Rho LT Crew wins — at 155 g it is 60 g (28%) lighter than the Icebreaker Merino 200 Oasis Crew Long Sleeve (215 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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