When a t-shirt won't cut it but a jacket is too much, turn to the trail runner warm LS zip t-shirt 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: 91% Polyester, 9% Elastane. Weight: 300g/m.