Be the definition of fun in the sun with these chic sunlight-activated square glasses. The glossy TR90 frame goes from frost white to colorful when exposed to direct sunlight which is a great surprise for any outing (try them with photochromic lenses!). The lightweight flexible style provides amazing comfort for all-day wear. It is available in the following color options: pink blue or yellow. *Color saturation will vary based on exposure to sunlight. | Zenni Square Prescription Glasses Yellow Plastic Full Rim Frame