Reebok International Limited is an American fitness footwear and clothing brand that is a part of Authentic Brands Group. It was established in England in 1958 as a companion company to J.W. Foster and Sons, a sporting goods company which had been founded in 1895 in Bolton, Lancashire. From 1958 until 1986, the brand featured the flag of the United Kingdom in its logo to signify the origins of the company. It was bought by German sporting goods company Adidas in 2005, then sold to the United States-based Authentic Brands Group in 2021. The company's global headquarters are located in Boston, Massachusetts, in the Seaport District.

J W Foster & Sons Limited was an athletic shoe manufacturing company located in Bolton, England. Established by Joseph W. Foster in 1895, the company was a pioneer in the use of track spikes for runners and athletes, producing most of the highly-regarded running shoes in the 1920s. J.W. Foster & Sons was absorbed by Reebok in 1976.