Abus Powerdome 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 Zoom Spin adjustment system: rotary wheel at the back of the head for individual adjustment of the helmet to the head size Stitched straps: for optimum aerodynamics, the straps are sewn and therefore do not require any strap dividers this means they fit particularly snugly and do