OAS is a Swedish lifestyle brand that sells swimwear, beachwear, accessories, and resortwear. The brand was founded in 2010 by Filip Rosen, and its name is derived from the initials of its founder's name, Oliver Adam Sebastian. OAS's products are designed in Sweden and made in Portugal, and are known for their simple silhouettes, plush fabrics, and retro patterns. The brand focuses on Scandinavian style, comfort, and sustainability.