Rainpal looks like a well-thought-out invention. It fits to just about any helmet, it gives you multi-speed visor wiping, wiper delay and visor cleaning spray, and it's tested up to 100 mph (160 km/h). It charges via USB and snaps off in seconds when the sun comes out. By any objective measure, itâ€... Read more
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An easier solution may be to just cover the visor in liquiglide?
Glass windows that clean themselves
(5 upvotes)Spacecraft and aircraft coatings that prevent ice build-up
(1 upvotes)Phone cases that float
(3 upvotes)Waterfall road signs
(6 upvotes)Liquid medicine containers that leave no residual medicine
(4 upvotes)Non-stick ketchup bottles
(4 upvotes)Toy balls that bounce on water
(1 upvotes)Wipey are requesting funds to make one of these. They need a light-weight version for mountain bike goggles.
Rainpal sell these already