Brentwood 2.0 bike helmet, Zipmold + technology, type K ajustable strap, patented soft visor, 345g, standards CPSC, EN1078. S : from 52 to 55,5 cm. M : from 55,5 to 59 cm. L : from 59 to 62 cm. Bern focuses on designing stylish, innovative, and purpose-built helmets that appeal to riders looking for something a little out of the ordinary. Being the original all season helmet brand, they are made up of people passionate about staying outdoors.