The A-1 Chest Protector features a Level 1 CE and UKCA Certified Polyhedron Hybrid Technology chest and Polyhedron Technology back protector that offers unsurpassed Levels of ventilation, is super-lightweight and delivers excellent upper body protection against impacts. 18% of the chest protector’s structure consists of ventilation apertures and these are aligned through both layers of the hybrid structure to ensure maximum ventilation and airflow