One K Defender Chrome Stripe Helmet One K Helmets boast the perfect synergy between advanced technology and aesthetically pleasing design. With enough features to appeal to those seeking everything a helmet could possibly offer, wrapped in a package that traditionalists can appreciate, One K has the best of both worlds. Features: Advanced ABS Composite outer shell Injection molded design Washable, quick-dry, moisture wicking, anti-microbial liner Stainless steel mesh Hook and loop adjustment Fastex buckle Two side, two front, one back, and two center stripe vents Comfort padded harness with synthetic suede lining Matte Polycarbonate Certified to ASTM and CE EN standards