Bolle Kids Sarah Sunglasses Light yet offer good shock resistance Ergonomic profile for better fit on face or head With a visible light transmission of 10%, they are ideal for sunny environments 8 base. Offers better periphery vision Protection from UVA, B and C rays Finest grade nylon is utilized in our frames to create lightweight, incredibly durable and ultimately flexible frames. 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. National Sun RX Program offers patients a precise fit and a broader more accurate field of view.