The American, sometimes referred to as the "English" cavy, is the most common breed of guinea pig, as well as one of the oldest. The hair is short, smooth, straight, and sleek. It is found in a wide variety of colors and color combinations and has a Roman nose (wide and curving). Its body is medium length, and of about the same circumference from the shoulder back to the hip.
The American Satin has the same appearance as the American, but the coat is fine, dense, and soft, with a glossy sheen, and feels like satin to the touch.