Straight best lenses for low to very low light. use these in your worst conditions, thats what they were built for. and for what they were designed, they kick ass! if you want a flat light lens, this is it.

One of the best (if not the best) flat-light conditions illuminator, bright and contrast.
Perfect for storm-riding, so it's generally speaking my no-friends-pow-day lens, happy to wear it.

As mentioned everywhere - it is pure specific and not all-conditions universal lens so you'll need a spare one if the sun comes out .

Summary: must have if you like storms, but know what you buy.

I have them as an extra lens for my Wisdom Goggles. I haven't ever used them, but when looking through them to get a feel for what they do was what sold me. They are a very purpose built lens. Maximum contrast with minimal shading. They are amazing for seeing definition in snow.