Mineral Glass – Created from natural elements like sand and soda ash, glass is endlessly recyclable and harmless to humans and animals alike. Its high resistance to scratching and lack of distortion make it the world’s best lens material. It really does have to be Mineral Glass.

4 Base Lens Curve – Lens 'Base Curve' is a measure of the front curvature of the lens. The higher the number, the greater the curve. 4 and 6 base lenses are generally flatter across the front. 8 base lenses have a greater curve for a more 'wrapped' look.

Metal and Handmade Acetate Frame – Made with premium quality acetate (originating from renewable resources wood pulp & cotton fibre), the ideal material for making durable eyewear. Its hue is embedded within the product rather than sprayed onto the surface, retaining colour brightness and preventing peeling & fading. OTIS handmade frames have stainless steel wires injected into the temples for adjustability - a task best performed by an Eye Care Professional.

Frame Sizing – 49 mm Lens Width / 23.5 mm Bridge Width (Distance Between Eyes) / 143 mm Temple Length

Metal Frames (On Pewter Wire Colorway) – Made from hard metals - either stainless steel or Monel (a type of hard metal alloy comprised of nickel and copper). These materials are resistant to corrosion and fast flowing sea water. Some of our metals have been finished with matte or brushed effects. These finishes make the metals appear duller and more vintage to achieve a more premium look. Duller finishes also do not absorb or attract more sun to the delicate eye wear.

Vissottica Hinges with Stainless Steel Screws – OTIS frames are produced with high quality 3, 5 and 7 barrel hinges. These premium grade Vissottica brand hinges are extremely durable and boast 100% corrosion resistance.

100% UVA / UVB Protection – 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.

This product may contain chemicals known to the State of California to cause cancer, or birth defects, or other reproductive harm.