I have been making these as a composite. And the only other option is a foam seal that really didn't fit well. So I got off my a$$ and improved these.
The problem has allways been that the water can get into the lens easily. Now I made a lip that contours to the inside of the lens gasket. I made this from neoprene at 40 duro so it's nice and supple. I'm really happy with how this came out. I will a product ready to ship in 2 weeks. Who want's these?