SPIDI is currently an active member of the WG9 committee, which has been ruling motorcycle related Personal Safety Devices for years. SPIDI's Warrior Chest Protector is in fact regulated as level 1 prEn 1621-3
The Warrior technology is composed by 3 layers (one Polypropylene and the other two Polyethylene), all shaped as a square blocks structure designed to spread out the shockwave
Spidi's Warrior Chest Protector comes built in or optional on most SPIDI jackets