Designer Klein is a term used to refer to two of the most influential fashion designers of the 20th century, ANNE Klein and CALVIN Klein. ANNE Klein was an American fashion designer who founded her own fashion house in 1968. She was known for her modern, sophisticated designs and her use of fabrics such as jersey and tweed. CALVIN Klein is an American fashion designer who founded his own fashion house in 1968. He is known for his minimalist designs and his use of luxurious fabrics such as leather and cashmere. Both designers have had a major influence on the fashion industry and their designs are still popular today.