The aesthetically pleasing One K Defender helmet now comes in children's sizes to keep our little one's safe in the saddle. Matte polycarbonate and advanced ABS composite outer shell Injection molded shell design Washable, quick-dry, moisture wicking, anti-microbial removable liner Stainless steel mesh Comfort padded harness with synthetic suede lining Two side, two front, one back, and two center stripe vents Safety standards: certified to ASTM standards. One K Defender Junior Helmet