Abus Powerdome MIPS Helmet-Gleam SilverFeatures Ponytail Fit: thanks to the opening in the height adjustable adjustment system, the helmet is also suitable for long hairstyles such as ponytails, buns, or braids Mips layer: thin plastic shell located between the inner padding and the energy absorbing shell of the helmet to counteract rotational forces in the event of a fall Zoom Spin adjustment system: rotary wheel at the back of the head for individual adjustment of the helmet to the head