In an effort to better serve our customers , we have recently updated the owner’s manual for the defNder.

Highlights of this manual include:


  •  A revised illustration to help customers with the helmet hardware installation
  • Instructions for using the new tool which assists the hardware installation
  • A description of the new spacer which will make the device slightly wider for larger drivers
  • Written instructions to assist with the adjustment of the device for various seat angles

Simply click on this link and you will see the new manual…. MANUAL (please be patient while the file is loading)