Chest and back plastic shells are constructed from a plastic that balances high levels of flexibility with low weight Thermoformed soft BioFoam chassis for increased comfort CE rated to EN14021:2003 Stone Shield Revolutionary BioFoam® chassis attachment system eliminates injury-causing plastic rivets and utilizes soft plastics and TPR rubbers without high points that could injure in the event of an impact Chest and back plastic shells highly perforated for maximum airflow helping keep the rider cool Air channels molded into the BioFoam allow hot air to escape Integrated Y-strap system for modular use with or without the back plate Adjustable shoulder straps for a custom comfortable fit Easy-to-use waist belt buckles integrated into the chest plastic Low-profile design can be worn under jersey