Bolle Performance Dash 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. All purpose Grey Lens. Neutral. Fit: Medium/Large Lightweight, premium-grade resin that's 20 times more impact resistant than glass-and three times lighter Armor shell on both sides of the lens to protect against scratches.