The On Climate Zip Hoodie uses ThermaTec insulation to add lightweight warmth to cold-weather runs without sacrificing a streamlined feel. A woven fabric with a multidimensional surface structure wicks sweat and manages moisture, while an adjustable hood, secure zip pocket, and thumbholes round out a mid-layer built for pushing the pace when temperatures drop. What Our Gearhead(R) Experts Are Saying:"I pull the balaclava out of the hood the second the wind picks up on an exposed stretch, and it's back inside before the next mile without ever breaking stride."