Unless you're a dedicated early riser or a religious sunset cyclist, you'll end up fighting the heat on rides that take you under the midday sun. As it gets hot, though, the Gore Bike Wear Xenon 2. 0 Women's Jersey keeps the temp turned down, with a plethora of mesh panels and a heat reflecting treatment that make it Gore's top shelf offering.The heat reflecting treatment we just mentioned' It's called Coldblack, and it actually reflects up to 80% of the sun's rays, even when applied to dark fabrics. This works in conjunction with mesh vents on the arms, underarms, and backs, helping you stay cooler than a pickled cucumber when the asphalt gets steamy. There's also a full length front zipper that allows for near unlimited ventilation. The details matter, too, though, and the Xenon 2. 0 is packed full of them. All the seams are joined using ultrasonic welding, rather than stitching, which reduces bulk, streamlines fit, and eliminates points of potential irritation. The three back pockets are accented by a separate zippered pocket to secure a phone, cash, or credit card, and Gore finished the jersey off with 360 degree reflective accents to help you stay visible if your noontime ride lasts all the way into the twilight.