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New to the United States, 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. Certified to ASTM and CE EN standards. One K's Defender helmet features a sturdy Polycarbonate and Advanced ABS Composite outer shell (available in a matte or glossy finish); injection molded shell design; washable quick-dry, moisture wicking, anti-microbial liner; stainless steel mesh; comfort padded harness with synthetic suede lining, hook and loop adjustment, and Fastex buckle; two side, two front, one back, and two center stripe vents.