Lovingly made by hand, the River frame is all about bl***ing those classic vibes with quality craftsmanship that’s built to last. Plus, those organic acetate frames and Carl Zeiss Vision lenses with full UV and UVB protection? Absolutely a must-have from Monokel Eyewear. Organic & Biodegradable Acetate Frame 100% UV & UVB Protective Carl Zeiss Vision CR39 Lenses Anti-Scratch & Anti Reflective Treatment 5-Barrel OBE Stainless Steel Hinges Keyhole Nose Bridge Horizontal Rivets At Temples & Front