If you drive a hybrid and frequent ski resorts that offset their energy with wind power, you may appreciate Optic Nerve's Maxfield sunglasses, which are made without any petroleum based products in the frame or the rubber bridge. The frame is made from 100 percent castor bean oil. The shades come in a bamboo pouch. The Maxfield, along with the three other earth-friendly models in Optic Nerve's Forsee line, all cost a reasonable $69.