As a snow skier, I have seen wipers for ski goggles that you wear around your neck, along with all the other gadgets on the lanyard, but this invention is just for the rider.
These thumb size little blades are perfect for wiping your visor if you happen to get caught in the rain or end up in the mud for those off-road days. They velcro onto any one of your digits but fits best on the thumb. Retail price is around $8.95.