Sierra is a stylish dry sunglass frame from 7Eye. The sunglasses are specifically designed for the indiviual with Dry Eye Problems. Made with surgical Silicone and designed to protect from wind, air conditioning, and other irritants. All these frames features a removable, latex-free eyecup with AirShield technology to block out wind, dust, pollen, and airborne irritants. These 7eye by Panoptx sunglasses are suited for adventure sports – motorcycle, ski, glacier climbing, parasailing, paragliding, and alleviates dry eyes patients as well. 100% UVA B protection.