Features: Globally Certified - CPSC, ASTM F 2040 & EN 1078 certified Traditional ABS Construction Machined Air Vents with Internal Channels Signature Harsh Embossed Logos Suitable for Scooter Riding, Skateboarding, Inline/Roller Skating, biking Weight: Approx. 380g Sizing: Extra Small: 48cm-52cm Small/Medium: 52cm-56cm Medium/Large: 56cm-59cm Harsh ABS Helmets are high density, injection molded, ABS shells, which feature a high impact absorbing EPS foam liner. Allowing for multi impacts without compromising on durability or strength. Harsh have designed their helmet to have a low profile to provide more protection around the base of your skull. With adjustable chin straps fitted, it allows for an easy secure/release fastening. There are multi directional air vents which have been machined into the outer shell, to keep your head cool no matter which direction youre riding.