Core warm. Arms free. That's the Chamois Vest. A men's insulation layer built for anyone who runs warm on the move but needs the cold off their core when they stop. 100% Primaloft Silver insulation in a lightweight nylon shell — packable, compressible and warm even when damp.
External zipped lower pockets with brushed lining for cold hands. Brushed throat tab keeps the collar comfortable against the neck all day. Double hem cord pullers cinch it in when the wind finds a gap. Internal zipped chest pocket doubles as a stuff sack — pack it down, clip it to a loop and pull it out when you need it. Core sorted. Arms free. 320g all in.