Ph automatically adapts to changing light conditions they turn dark when its bright and become virtually clear in low light conditions especially the available light range is unique bbbs lenses can adapt from allowing 85 17 of the available light to flow through 100 uv lenses with 100 uv protection face comfort flexible temples and adjustable nose piece provide the perfect fit grilamid ems bbb sport glasses frames are made of grilamid tr90 this is a light and flexible material pro