Stylish mens/womens/unisex 'Wayfarer' style sun readers reading glasses sunglasses from UV Reader for sun-loving bookworms. UV400 protection from harmful UVA and UVB rays. Sturdy frame design with spring loaded hinges. Includes FREE protective case. In brown tortoiseshell finish. Available in multiple strengths. Strength is specified on a dioptre scale of +1.00, which provides the least amount of optical power, through to +3.50, which provides the greatest amount of optical power for weaker eyes.