What Our Gearhead® Experts Are Saying: “This jacket is perfect for cold gravel days. The Primaloft front shields me from windchill, and the merino back keeps me from overheating on long climbs. The side zips are super clever—I can reach my jersey pockets without taking the jacket off. It layers beautifully depending on how cold the day gets.” We pull on the Shimano Evolve Prima Wool Jacket when crisp winter mornings and cold-air descents demand warmth we can rely on without sacrificing breathability. Shimano pairs Primaloft insulation on the chest and shoulders for wind-blocking comfort with merino wool across the sleeves, sides, and lower back to regulate heat through shifting intensities. The raised merino collar adds a soft, insulating buffer that’s especially welcome on exposed ridgelines and breezy descents. Smart features elevate every ride. Invisible side zippers give us quick access to jersey pockets below, and a two-way chest zipper lets us ventilate or reach layers instantly. Reflective details around the sleeves and waistband enhance visibility when daylight is short, helping us stay seen in low-light conditions. Whether layered over a baselayer in the 40s or paired with a winter jersey in the 30s, this jacket keeps us warm, comfortable, and ready for the miles ahead.