Bolle Performance Vitesse Sunglasses Finest grade nylon is utilized in our frames to create lightweight, incredibly durable and ultimately flexible frames. Silicone nose pads can be tailored for a custom fit. Hypoallergenic nose pads are comfortable and durable. Modulator lens adjusts, so your eyes don't have to Lightweight, premium-grade resin that's 20 times more impact resistant than glass-and three times lighter All purpose Grey Lens. Neutral Fit: Medium/Large