From the manufacturer Shatterproof Lenses Shutout's polycarbonate lenses provide optical quality with 100% UVA/UVB protection. The shatterproof, scratch-resistant lenses can handle any outdoor sport. Integrated Hinge The integrated hinge of Shutout keeps the frame sleek and helps to hold its shape, guaranteeing durability. No-Slip Rubber Nose Pieces Hydrophilic rubber nose pads are soft for comfort and provide a no-slip fit that grips the more you sweat. Durable Youth Size Frame The characteristically lightweight and comfortable frames of Shutout are made of Grilamid TR-90 and engineered for youth face shapes.