Air pump system provides the ultimate in comfort & custom fit. 3 hidden air pockets in liner inflate by depressing concealed air pump until desired fit is achieved.

The Defender Air features a Chamude synthetic suede covered 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 F11163-04a and CE EN 1384 standards.