The Arc'teryx Rho Merino Wool Zip Neck is a lightweight, versatile base layer that is your ultimate companion for ski tours, backpacking trips, climbs, and any outdoor activity. Crafted from luxuriously soft, 150gsm Merino wool, it provides exceptional natural thermoregulation, odor resistance, and static-free comfort next to your skin. The wool fibers are wrapped around a nylon core offering an ideal balance of softness, durability, and performance. Articulated patterning ensures unrestricted mobility for dynamic movement. The deep front zipper allows for easy on-and-off and rapid ventilation control. Flatlock and Merrow stitch seams create a smooth, irritation-free feel. Responsible Wool Standard (RWS) certified guarantees ethical sheep farming practices and environmental responsibility. Arc'teryx Rho Merino Wool Zip Neck Features 240gsm Mountain Merino Wool - 95% wool, 5% elastane Flatlock seam Articulated patterning Deep front zipper Wool is sourced from humanely raised, non-mulesed sheep Fit:Fitted Weight:300g Arcteryx Rho Merino Wool Zip Neck