Great gilet for cooler days our running or cycling. It packs extremely small and has a tough windproof material on the front to keep the chill off your chest. The rear has a mesh panel to aid breathability. The shoulders are elasticated for comfort and flexibility. Roll it up, put it in your pack or pocket and pull it out when you feel the chill! It has reflective piping for safety at night and a reflective TES logo on the rear.