Material Jersey Holl stretch fabric vest External polypropylene perforated and corrugated plates Inner core in Nidaplast and Crash Absorb Performance shock Back protector certified Cat. II - EN 1621.2/2003 lev. 1 Back protector certified Cat. II - EN 1621.2/2014 liv.1 Standard Comfort Airnet Imola 3D for the comfort Temperature adjustment External perforated pads Internal Nidaplast with perforated structure Back protector certified Cat. II - EN 1621.2/2003 lev. 1 Directly from the racing world. On the track, the maximum riding performance is ensured only when the rider is completely concentrated without worry of injury in case of fall. Dainese® has always provided its champions with the latest state of the art in terms of safety and then transferred this technology to products for the public at large. Back protector homologation is the final step in making the same protectors used and tested by champs like Valentino Rossi available to motorcycle riders everywhere. The homologation of back protectors to EN 1621.2/2003 Standard means that they have successfully passed a maximum impact force transmissible level before sale. The Standard assesses protectors at two performance levels after receiving a series of impacts from a striking force in a predetermined area. - Level 1: limit of 24 kN per single impact, 18 kN for the average of all impacts - Level 2: limit of 12 kN per single impact, 9 kN for the average of all impacts.