The Arc’teryx Norvan DownWord LS is a long-sleeve built for mountain missions. The Phasic™ FL fabric is soft, light, and fast-drying, while Delta mesh on the back dumps heat when the pace spikes. A Silvadur finish keeps odors at bay, and a light FC0 DWR sheds drizzle without feeling crunchy. Merrow seams mean no chafing, and split side hems move with your stride. The articulated cut frees your arms on climbs and descents. A reflective side logo pops in low light. At 111 g, it’s barely there but ready for anything. Perfect for trail runners, mountain athletes, and anyone who moves fast and far.