Bethany also asked about sizing. Sometimes it takes some digging to figure out what exactly what size is a "small" or "large" or whatever. Here is Giro's size chart:
http://www.giro.com/giro/fitguide/he...zing_chart.pdf
I have to use a Giro small, and a universal fit in a Giro is too big for me. I actually measured my head in centimeters when buying a Tilly hat and knew my head size.
I also have a Bern helmet, the Berkeley. I love this helmet for comfort and I think it looks cool.

However, it is not the best for hot weather but is ideal for cool weather cycling and tooling around town. In the Berkeley I wear an xs. Here is their size chart:
http://www.bernunlimited.com/Product...elmetType=Snow
I suggest first measuring your head to see what helmet size will fit. Then, try on helmets that are available to you to try to get an idea of the helmet shape that works for you, whether rounder or more oblong. I have noticed that different price points of the same brand sometimes have different fit quality. I have a Giro Aeon (I wanted the hi viz). This is a pricey helmet. It fits me like a glove, better than my old bottom of the line Giro ever fit.
Last edited by goldfinch; 02-19-2012 at 06:50 AM.
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