My parents are going to skiing next month, I wanna buy sunglasses for them from the online eyeglasses stores. Do you have any idea about which kind of sunglasses is good for skiing? And the average price at the online stores?

The sunglasses with yellow or copper polarized lenses are good for snow skiing. I have bought a pair of polarized sunglasses from an online optical store PrescriptionGlassesOnline.net and it just cost me USD47.90. It is really comfortable for wearing.