http://ift.tt/1mcxk52
For years, helmet makers talked a lot about vents. The more vents, the better the helmet, common wisdom went (although internal channeling has as much if not more effect on cooling). Then the talk switched to aero performance: fewer vents were faster, but hotter. Now many companies are trying to finesse a happy medium between cool and fast. Some, like the Giro Synthe or the Kask Protone, settle for a single shape that is fairly fast but with plenty of air flow. Other, like the Bell Star Pro, Casco ...
via Cyclingnews Features http://ift.tt/1oYCgGs
For years, helmet makers talked a lot about vents. The more vents, the better the helmet, common wisdom went (although internal channeling has as much if not more effect on cooling). Then the talk switched to aero performance: fewer vents were faster, but hotter. Now many companies are trying to finesse a happy medium between cool and fast. Some, like the Giro Synthe or the Kask Protone, settle for a single shape that is fairly fast but with plenty of air flow. Other, like the Bell Star Pro, Casco ...
via Cyclingnews Features http://ift.tt/1oYCgGs
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