U.S. M2 Lightweight Optical Masks. On left is the WWII-era M2-10-6, to its right is the more common postwar M2-10A1-6. The M2-10-6 pictured is missing its M3 Hose, which I hope to
Oculus Optical Mask
Prescription Masks | Maui Jr. Optical Mask + Accessory Pack