First released back in 1998 this helmet really came into the spotlight in 1999 when it protected Tony Hawk from serious injury during his full loop attempts. It's a classic shaped halfshell lid that served as a template for many others to follow. Its hardshell construction is made from ABS plastic that is bonded to the EPS foam inner core to create high durability and incredible impact protection. It also features TSG's Tuned Fit System allowing a rider to easily dial in the perfect fit using different thickness pads on the interior of the helmet, those pads are coloured making it easy to determine the right pads to fit the helmet to the head. For ventilation the Injected Helmet features 13 vents to take in fresh air from the front and remove air through the rear vents to keep you feeling fresh. Size guide: Small/Medium: 54 - 56cm (21.25" - 22") Large/X-Large: 57 - 59cm (22.4" - 23.2") Colour: Black, White; Size: S/M, L/XL