Somehow and someway I ended up with two of these from back in 2020. I ended up with the medium instead of this size. Long sleeve Rapha Pro Team thermal aero jersey in MEDIUM in navy and chartreuse trim color. Material is like a stretchy material in my opinion and can be worn on days when it starts off cool, for example like low 50s and then warms up to 63 degrees you should be ok. The jersey can be worn as option to opt out of the arm warmers. Features are standard full pro style fit, quick cooling full zipper, three rear pockets, very visible with the various contrast as well. The sizing is race wear fit and this measures about 18″ to 19″ laying flat but in a race wear fit. The combination of warmth and racing performance is tough to achieve because insulation usually results in a bulkier garment. The Pro Team Long Sleeve Thermal Jersey is both fast and warm. The jersey fabric is a slightly thicker version of the current Pro Team Long Sleeve Aero Jersey and has a fleecy brushed back inner for on-skin comfort. The jersey is cut in our Race fit and it should be reasonably tight to ensure nothing flaps in the wind and slows you down. Further speed advantages come in the form of bonded back shoulder seams with none at all on the front as well as a new rear pocket construction that lies completely flat when not filled youll cut straight through the wind. Designed for winter training when skies darken earlier there are reflective elements all over the jersey as well as headphone loops and an easy-use Vizlon zip. A cold-weather training jersey for riders and racers looking to stay aero without freezing. Warm fast and reflective.