Garneau's Course 2 sleeveless jersey offers ultimate performance in hot weather. The body and X-shaped back are made with CB Mondo fabric, a highly stretchable light knit that provides softness, comfort and 50 UPF/SPF protection. In addition, the Coldblack finish allows heat to be reflected, preventing the rider from overheating. At the top, Lightsens Mesh, an extremely light fabric with large stripe construction, offers excellent breathability and a racer look. Microsens Mesh side panels offer moisture wicking and enhance comfort on the skin. The combination of these lightweight fabrics makes for a super light sleeveless jersey that weighs only 98 g (3.5 oz) for a medium size.