Info I have read, says a wrap around design gives better coverage and a better view to the sides, not sold on polarized lenses as it seems they don't give very good depth perception, where as a grey or brown works better. 100% UV protection is what I want also. I definitely need something, as the last couple years on snow camp trips, around my eyes I get pretty puffy the next day. Look funny, like I had allergies real bad. I may go with some Cocoons, I need to go in and see what they offer in light transmission soon, as my trip starts early August. I know Cocoons don't offer sub 10% light transmission.