Pair is a company that specializes in customizable eyewear, offering a variety of eyeglasses and sunglasses for women, men, and kids. They allow customers to select base frames and personalize their glasses with interchangeable magnetic top frames in different styles and themes. Pair also provides various lens options including single vision, progressives, and blue-light filtering lenses. They emphasize flexibility and personalization in their eyewear products and support the Eye Alliance charity, donating a portion of each purchase to the charity's mission of providing clear vision to children in developing countries. Pair offers free shipping, returns, and exchanges on U. S. orders, encouraging customers to find a pair they love.