Brentwood 2.0 bike helmet in PVC, Zipmold technology, integrated soft visor, type K attachment strap, weight 345g, CPSC standards, EN1078. S : Head circumference from 52 to 55.5 cm. M : Head circumference from 55,5 to 59 cm. L : Head circumference from 59 to 62 cm. We will easily fall for this Brentwood 2.0 bike helmet for its deep and elegant color as well as for the certain protection it will bring us with style and modernity.