Description Product Details Warranty Information Proof Heber-Matte Black: Eco-friendly frames from Proof Eyewear. Handcrafted from cotton based acetate. BPA free. Water and sweat-resistant. Quote on inside of temple: "Create your own luck" With each frame purchased, five trees are planted. Frame Material: Cotton based acetate and metal with keyhole bridge. Fully biodegradable. Fit: Medium 50 23 145 48 Comes with: Companion Case, Cleaning Cloth, 1oz. Eyeglass Cleaner Free Shipping (USA) Frame Size: Medium (49-52mm) Bridge Width: 23mm Temple Length: 145mm Color: Black Shape: Round Material: Bio-Acetate Style: Full-Rim newOptions: true 30-Day No-Hassle Guarantee