From ski tours to climbing trips, move through the mountains in thermoregulated comfort with the men's Arc'teryx Rho Merino Wool Crew Neck base layer. It's made of a soft yet and durable wool blend.

-240 g/m2 Mountain Merino Wool: 95% wool/5% elastane; Chira 6.5 oz. (220 g/m2) stretch nylon interlock: 71% nylon/29% elastane (bluesign-approved material)

-Midweight

-Moisture Wicking

Fits true to size