Precision optical grade acrylic prismatic lens.
Three different interchangeable lens plates are included. (1-3/4X #3, 2X #4 and 2-1/2X #5)
Visor can be worn over prescription or safety glasses.
11 design shields out unwanted glare.
High strength plastic will not break.
Made in USA.
Donegan Optical Opti-SIGHT Visor