The Defender features glossy or matte Polycarbonate and Advanced ABS Composite outer shell; injection molded shell design; washable quick-dry, moisture wicking, anti-microbial liner; stainless steel mesh; comfort padded harness with synthetic suede lining, hook & loop adjustment, and Fastex buckle; two side, two front, one back, and two center stripe vents. 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.

Sizing Guide

• XS: 6 3/8 - 6 1/2
• S: 6 5/8 - 6 3/4
• M: 6 7/8 - 7
• L: 7 1/8 - 7 1/4
• XL: 7 3/8 - 7 1/2
• XXL: 7 5/8 - 7 3/4