Duke is a stylish dry eyeglass frame from 7Eye. The eyeglasses are specifically designed for the indiviual with Dry Eye Problems. Made with surgical Silicone and designed to protect from wind, air coditioning, 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