Arc'teryx Rho SV Mens Zip Neck 2026

The Rho SV Zip Neck is Arc'teryx warmest, most technical base layer yet—constructed to keep you comfortable without creating bulk. The synthetic, hollow-core fleece is breathable during high-output ascents and descents, while the zip-neck and extended collar provide an option for extra ventilation or additional coverage, depending on what the conditions call for.