CASALIVA Motorcycle Helmets

DOT Safety Certified Helmets Professional Helmets, Our Helmets Impact Energy Absorption: Maximum acceleration must not exceed 400 G; impact duration above 200 G must be less than 2 ms; impact duration above 150 G must be less than 4 ms. Penetration Resistance: The steel cone under test must not penetrate the helmet at the point of contact with the head. Retention System Strength: During testing, the retention system must not elongate more than 25 mm, nor must the straps break or the connectors become detached. Structural Design: Specifications regarding viewing angle, ventilation holes, etc. are clearly defined. Protrusions: Internal protrusions are not permitted; external protrusions must not exceed 5 mm in length. There are three sizes available to choose from, depending on your needs: M: Suitable for head circumferences of 57-58 cm. L: Suitable for head circumferences of 59-60 cm. XL: Suitable for head circumferences of 61-62 cm.