Protective face shield with an aluminum frame (mounted on a helmet)

Shield protective against mechanical influences with fastening to a helmet.
Screen material - impact-resistant polycarbonate; frame material is aluminium.
Optical class - 1 (does not give distortion); protection against mechanical influences - class B. Screen: 1mm thick with metal edging; Convenient screen mount ensures quick screen replacement. Frame: reliable 3-position screen position mechanism; fastening to a helmet by means of a spring placed inside an elastic safety tube.