free safety sport band
http://www.mygoodyear.co.uk/safety/sportTheBand/

Goodyear have produced thousands of safety arm bands, which allow participants to carry information about their blood group, allergies, family contacts and other vital information designed to save the lives of horse riders and sports people across the country.

The waterproof and luminous bands fit comfortably onto the sleeve and could save vital time in the event of riders having to be treated for an injury, and will be sported by the likes of Zara Phillips during British Eventing's competitive season.