Fly Racing Evolution DST Jersey Red/Grey Men's Size Medium Laser-cut perforations for advanced ventilation Full mesh back and integrated mesh in key areas Zero-cu_ 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