THIRD EYEPRO HELMET MIRROR
If you want the added visibility and safety of a mounted mirror, but don't want to add any accessories onto your handlebars for fear of impacting your maneuverability in traffic, then try this helmet mounted alternative. Just a quick glance is all it takes to survey the view behind you - this product is called the Third Eye for a reason. Just don't expect total spiritual enlightenment, and enjoy a safer ride.
Apparently its the result of 10 years of development which sounds a bit bonkers to us but it works a treat!