Fly Racing Evolution DST S.E. Zen Jersey. Laser-cut perforations for advanced ventilation. Full mesh back and integrated mesh in key areas. Zero-cuff arm openings provide unrestrictive mobility. Multi-directional Lycra® neck and shoulder panels. Low profile multi-panel construction for maximum performance and a comfortable fit. Seamless armpit construction, with a single-continuous stretch mesh panel from the sides to cuffs which helps prevents underarm irritation. Silicone-printed tail keeps jersey tucked in. Pro fit: ergonomic arms created for riding position, with a slim cut.