High Transmittance: Upgraded double sided coating, good light transmission, similar to sunglasses, to avoid dissimilarity, difficult to distinguish is color blind glasses. Suitable for Various Face Shapes: Flexible and light elastic, not easy to pinch the face, open and close smoothly for a variety of face shapes to wear, not easy to fall off, easy and comfortable! Structure of Color Blind Glasses: This colorblind glasses with modern stylish design and ultra light and durable alloy frame, which is suitable for both men and women. Gift of Colour: Color blind glasses that make people see color can enjoy seeing rich vibrant colours that most people experience all of the time and take for granted. Give yourself or a loved one the life changing gift of colour. For Outdoor and Indoor Use: All of our glasses are designed specifically for bright environments, helping to solve problems such as solving driving trips and art hobbies.