Join Date: Feb 2006
Location: Sin City, Nevada
Bikes: Catrike 700, Greenspeed GTO trike, , Linear LWB recumbent, Haluzak Horizon SWB recumbent, Balance 450 MTB, Cannondale SM800 Beast of the East
What's more important is that you buy a helmet that is the right size and then adjust the straps correctly. There should be a tag inside the helmet giving the head size it fits, the name of the manufacturer, the date manufactured, and the statement that it meets US Consumer Products Safety Commission standards for a bike helmet. The Snell foundation used to set helmet standards and to test them but today there is a federal regulation setting minimum standards. The pamphlet that came with my most recent helmet has pictures showing how a helmet should fit. There's also a bold statement in the owners manual, "One crash and it is trash" warning users to replace the helmet if you do have a crash.
I found the adjustable helmets with the adjustment knob in the rear to be a PIA because the knob did not lock in place and it would reset each time I removed the helmet. The other helmets, once adjusted, were ready to go each time I put them on.