The detachable lsquojaw bonersquo can be removed to minimise weight and encourage air circulation or left attached for a more classic look includes one extra pair of contrast lenses one extra spare rim and adjustable 20mm strap frame black lens browngold multi coating hydro spare lenses orange strap black bull 100 uva and uvb protection bull unbreakable polycarbonate lenses category 3 bull frame made of grilamid tr90 providing high flexibility and low weight bull adjustable frict