The Zonula combines sustainability with user-friendliness. The frame lock makes it easy to handle and replace the panes. By simply pressing the locking mechanism, a gap is created between the frame and the pane. This allows you to grip the edge of the lenses and remove them without damaging the surface. The frame and strap are made from 47% bio-based materials (based on weight) to do something good for the environment. The Clarity technology for clear vision was developed in collaboration with Carl Zeiss - for optimum vision in the snow in all riding conditions.