An ideal trim-fitting technical foundation for maximized wicking performance, the Rho LT Zip is ideal for cool weather aerobic activity. Arcteryx lightweight fibers move moisture away from your skin and a silver fabric treatment reacts with sweat to cut down on backcountry odors. Keep your house key safely stowed in the laminated arm zip pocket for your morning jog. Arcteryx integrates no-lift gusseted underarms in the Rho LT Zip for extra freedom of movement. The Rho LT for those who are always on the go.