DetailsLasting Size Chart A women's short sleeve cycling jersey. It is made of functional polyester microfiber and elastane. The sides and underarm are made of a special airy knit that provide air circulation. Flat elastic seams enhance comfort during body movement. There is a reflective extended zip in the front that has a lock against spontaneous movement. The jersey has reflective print in certain zones for enhanced visibility and safety. In addition, there is a rear reflective zipper pocket closed with a slider lock against involuntary opening. Material: 100% polyester.