Highway 21 .357 Solid Half HelmetsIf it aint broke, then dont fix it. The . 357 by HIGHWAY 21 embodies simple style and function of the classic half helmet by focusing on strong durable materials mixed with a little HIGHWAY 21 flavor. A timeless design to serve day in and day out that will not spoil your seat time. Buy it, throw it on, log miles. STANDARD D. O. T. approved CONSTRUCTION Durable lightweight ABS shell EPS (Expanded polystyrene) interior COMFORT LINER Diamond stitched