The Mysto Sunglasses Are Great Men's Shades. Italian Made, These Frame Are Built From a Natural Bio-Plastic, Derived From The Castor Oil Plant, The Material is An Amorphous Polyamide Based On 58% Renewable Resources. Bio Grilamid is a Smarter, Cleaner Alternative To Standard Petroleum-Based Plastics With The Same Characteristics And Ecologically Manufactured. Designed With Polarised Lens To Cut Out Reflective Glare, Improve Depth Perception, Sharpens Colour Contrast, And Reduce Eye Fatigue. Featuring Premium Five-Barrel Stainless Steel Hinges, Plus Comes With a Microfibre Pouch And a 2 Year Warranty.