The Foldable_C is made of hard shell strips joined by adjustable bands that stretch horizontally to fit the cyclist head, and compress to reduce the helmet's width for storage (much like an accordion). It's volume compresses by more than 20% to fit in a bag. When in use, the spaces between the shell strips provide head ventilation. Carrera introduced the concept in 2012. The current model is certified to both the CEN and CPSC standards.
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