The Defender Air riding hats boast PAS015 certified to ASTM standards.
The hats feature genuine Swarovski crystals and are the most adjustable
around due to our revolutionary air pump system which provides ultimate
comfort and a bespoke fit. The 3 air pockets at the back of the liner
are inflated by pressing its concealed air pump until you get the fit
you want. The quick dry liner is moisture wicking and this is helped by
the multiple air vents. 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. All
OneK Defender hats come compatible with the magnetically-attached click
in sun visor.