Check the listing for details. Oxford OX531 Glowz Helmet Bumper. Condition: New. Listed at 12.99 USD. Avoid rider and pillion helmets coming together with an uncomfortable 'thwack' by using the innovative new Oxford Bumper helmet protector! These knocks are almost unavoidable when riding pillion, but if you attach a Bumper to the back of the rider's helmet you can minimise the damage and discomfort.This unique product uses a carefully formulated blend of special materials to be extremely grippy without using adhesives.This means that you can take it on and off any number of times - either for re-positioning purposes or because you only want to use it when riding with a pillion. Product contained herein has chemicals known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information www.p65warnings.ca.gov