50% off makes them real reasonable. I've had 2 pair for over a year and they hold up to daily use. 1 pair for cloudly and low light conditions and another for sunny days. I just ordered some with bright lenses for dark cloudy days.

Coupon code is 46H as seen here: https://t.e2ma.net/message/85l62/shc2w1

http://solarcomfort.diopticssunwear.com/shop/solar-comfort-s...