K&N Air Filter for Aprilia RSV4 Factory / R 2010-2011 T shirts The instep and Achilles accordion

The instep and Achilles accordion flex zones are constructed for superior control and support

in the pass

Built in soft end loop

Textile mesh with open cell foam for improved air circulation and comfort

Note: The M1 helmet has a fairly round internal headshape

K&N Air Filter for Aprilia RSV4 Factory / R 2010-2011 T shirts The instep and Achilles accordionK&N Air Filter for Aprilia RSV4 Factory R 2010 2011 K&N Air Filters are designed to achieve a virtually unrestricted air flow while maintaining filtration levels critical to engine life. The secret to their success lies in the unique characteristics of the filter medium which was originally developed by K&N all those years ago in the dust, sweat and tears of desert motocross racing. The high flow cotton gauze air filter is washable, reusable and built