Accordion-like Carrera bike helmet folds to accommodate different head sizes

In old bicycle racing photos, many of the racers can be seen wearing what are sometimes now referred to as “leather hair nets.” Actually known as pistard helmets, they were made of padded leather and offered little protection, but they did conform nicely to the shape of the rider’s head. Carrera’s new foldable helmet is a modern (and safer) take on that same idea.

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