The NRG helmet has a smooth, matte effect outer with a breathable coolmax lining which is removeable and machine washable. The helmet inner shell is made from an EPS foam which is a hard foam designed to absorb shock whilst offering protection, the helmet is tested to SEI ASTM F1163-15 and VG1 standard. The NRG features a Dial-To-Fit system which allows the user to finely tune the fit of their helmet! Also featuring two large front vents. Suitable for almost all Riding Clubs. This item is non-returnable/non-refundable. Whitaker NRG Helmet