Monokel Eyewear simplicity and functionalism, paired with an endless curiosity for the human mind and its need for creative expression. Handcrafted with care. The River frame combines timeless influences with craftsmanship and fit that allows for lifelong wear. A true Monokel Eyewear staple. - Handcrafted from biodegradable acetate - 100% UV protective Carl Zeiss Vision CR39 lenses - 5-Barrel OBE Stainless steel rivet hinges - Teflon-covered hinge screws - Keyhole nosebridge - Double horizontal rivets on temples and front - Includes protective case, cleaning cloth and box for storage Frame width: 139.9 mm Frame height: 45.6 mm Lens width: 47.5 mm Nose width: 23.5 mm Temple length: 145 mm River Sunglasses - Chocolate