When a tee won't cut it but a jacket is too much, turn to the Trail Runner Warm LS Zip Tee from Salomon. Made from cozy warm actiTHERM French Terry, this layer features a 1/2 zip for customizable breathability, while hand warmers work wonders when the mercury drops. Reflective accents keep you safe after dark, and a chest pocket holds essentials close by. Body: PES 91%, EL 9%. Weight: 300g/m.