Pi1 Frame OptionsInnovative Optics Pi1Polycarbonate Filter | 65% VLT | Color: Light Yellow 802-830nm (OD 5)Step 2 – Choose a Frame… 531This frame easily fits over prescription glasses. The 531 features an adjustable hypoallergenic silicone nose bridge and adjustable flex temples.539The 539 frame is designed for smaller facial structures. The new adjustable nose bridge and temples provide for great stability and comfort. 561An innovative sport design with adjustable ergonomic temples and hypoallergenic nose bridge. Lightweight and comfortable 559 GoggleThe 559 Goggle easily adjusts to fit any facial structure and easily fits over prescription glasses. The goggle features an adjustable nose bridge.