Features: CE, SGS-approved helmet PC four-in-mold A sleek, aerodynamic design 20 air vents for maximum cooling Adjustable chin straps for added comfort JF-4 ring system Weight: 244g A quick-release strap buckle Protection whilst being comfortable to wear Size: 58 to 61cm Available in various colors Customized designs are welcome Helmet safety tips: Wear the helmet flat a top your head, not tilted back at an angle Make sure the helmet fits snugly and doesn't obstruct your field of vision Make sure the chin strap fits securely and that the buckle stays fastened Packing components: Inner packing: PE bag, color box, carton box or PE bag, head card and carton box With sticker logo and instruction manual With visor Packing style: 6, 8, 10 and 12 pieces/carton