Helmet Care and Storage

Extreme heat temperatures, UV rays, chemicals and solvents will damage the foam in a helmet. For these reasons a riding helmet should not be stored where temperatures can exceed 40 degrees Celsius, left out in the sun or stored near any chemicals. This would include a vehicle on a hot day, in a cabinet or tack box with bug repellent or bleach in it, or in a tack room with sunshine peaking through the window onto the helmet.

To clean a helmet use a mild detergent on the exterior for hard shell helmets, or use a brush on velvet. Helmet deodorizers and cleaners are available on the market and are recommended for the inner lining. Never leave a helmet in direct sunlight or near a heat source to dry.

Article Source- http://www1.agric.gov.ab.ca/$department/deptdocs.nsf/all/aet12574#care