NANO frames are specially designed eyeglass frames for kids that blend fashion and function. Made with a patented Siliflex (TM) material that is hpoallergenic, non-toxic and BPA free, these frames are light, flexible and can withstand the day to day wear and tear of kids. Each pair of NANO glasses can be worn two ways; with an exchangeable headband strap or half strap. Made of in a rainbow of colors that will lets kids express their playful style from the playground to the classroom.