From Otis

Active fashion that's a breath of fresh air. Aerial is made from a lightweight yet strong Eco-Grilamid frame with a sporty feel, that brings in cat eye inspired style for extra coverage. Perfect for those who want to stay light and bright, yet always feel like they're looking their best.

• Mineral Glass is created from natural elements like sand and soda ash. It's endlessly recyclable and harmless to humans and animals alike. It's high resistance to scratching and lack of distortion make it the world's best lens material. It really does have to be Mineral Glass.
• All OTIS fixed-tint lenses block 100% of harmful UVA, UVB and HEV light to provide superior protection from solar damage causing intraocular melanoma and macular degeneration, as well as reducing eye fatigue and reducing the visible signs of aging, while maintaining true color and depth perception.
• Lens 'Base Curve' is a measure of the front curvature of the lens. The higher the number, the greater the curve. 6 base lenses are generally flatter across the front. 8 base lenses have a greater curve for a more 'wrapped' look.
• Sizing: 56 - 16 - 137 (mm)
• High performance and low weight ratio. TR90's high-performance property profile and process ability makes it an ideal optical engineering plastic. The transparency, rigidity and impact strength of Grilamid compare favorably to other transparent polymers like polycarbonate. It is the lightest engineering plastic in existence, maximizing wearer comfort.
• Vissottica hinges with stainless steel screws