All new Supersport aero fit jersey is made from premium fabrics designed for ultimate comfort. Using the ultra stretchable & lightweight award-winning Italian sport Fabric, mesh fabric on the underarm panel helps control moisture wicking ,, while a full-length zip offers even more ventilation when necessary. further small, secure zipped pocket is located in the sides with reflective tape.. this is a high performance jersey for riders who demand performance from their kit so they can focus on their ride. size ref : XS- 35-26 : S- 36-38 : M 38-40 : L 40-42 : xL 42-44 : 2XL 44-46 :3XL 46-48 , All pictures shown are for illustration purpose only. Actual product may vary due to product enhancement.