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Arc'teryx Rho LT Crew vs Smartwool Merino 250 Crew
Weight and specs compared for 2026 — and which one to choose.
Arc'teryx Rho LT Crew is the lighter option — 115 g lighter than the Smartwool Merino 250 Crew (43% less weight). If grams matter to you, that is the one to beat.
Arc'teryx Rho LT Crew
155 g
Lightweight Phasic base layer for cool and active conditions.
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Arc'teryx Rho LT Crew vs Smartwool Merino 250 Crew: which should you buy?
If saving weight is your priority, the Arc'teryx Rho LT Crew wins — at 155 g it is 115 g (43%) 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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