The Protos Visor F39 has 39 notches/cm² which provides a better view (almost unobscured) and better protection from fine sawdust (e.g. beech, oak). This visor also has a special coating which reflects sunlight and prevents freezing over at temperatures below 0°C.
The rubber seal along top of visor, seals the area between the Protos Integral and the visor, thereby preventing moisture running onto the face.
Protos Visors are easily changed by simply clicking off and on the helmet at the connection points.