Amplify your bag collection; shop the best-selling crossbody, tote, backpack, sling bag, & much more via TopOfStyle. The Sak is a leading American handbag and backpack brand founded in 1989. Footwear and mobile accessories are the brand’s other product categories. Today, the brand is widely popular, and its products sell in over 10000 retail stores globally. Sky blue represents a sense of trust, loyalty, and understanding.