Handcrafted in deep black Mazzucchelli 1849 acetate, biodegradable and plant-based. The blue light–filtering lenses are designed to protect your eyes from the glare of screens and artificial light, helping to reduce eye strain and fatigue during long hours of work or study. The soft square silhouette offers balance and comfort, maintaining a clear, natural view while filtering harsh blue tones. Reinforced with a hidden copper core and eco-hinges for durability and lasting fit. Materials: Mazzucchelli plant-based acetate, blue-light filtering lenses with UV protection, lead-free copper core, stainless steel hinges Care Instructions: Wipe clean with microfiber cloth. Store in protective case when not in use. All pairs include: hard box, PU-leather case, and cleaning cloth. Acetate 100%