Dainese G2 back protector insert with ultra-light and thin Pro-Shape technology and EN 1621.1 Level 1 certified. Due to its structure, which features ventilation over 30% of the covered area, the Pro-Shape back protector is the perfect mix of safety, comfort, flexibility, and coolness.G1 is for body height up to 165 cm.G2 is for body height 170 to 185cm. Fits all Dainese jackets and may fit other jacket brands.