Prescription Pans... they work great for me at sealing out the wind. Only once have I had an issue with them, when the inside fogged over and limited my site to almost nothing.
ditto on the panoptyx, Ive tried just about every brand out there, Panoptyx is the best, And the warranty and customer service is AWESOME!!! I had a small issue with mine about 10 months after I bought them and they sent me a new pair in 3 days!!