Sweet as can be, Sammy's modish rounded butterfly shape is crafted from eco-friendly handmade bio-acetate paired with Revo's signature NASA-based polarized lens technology for unmatched visual clarity. The innovative bio acetate material is plant-based, organic, and fully biodegradable. Revo high-contrast polarized Serilium+ lenses Lightweight, impact-resistant, glare-reducing nylon, Handmade bio-acetate frame completely organic, plant-based, sustainable, and 100% biodegradable. Revo Light Management System(tm) filters harmful UV, HEV, and blue light, digital device-friendly reduces glare and enhances clarity of digital screens.