Slip-ons are typically low, lace-less shoes. The style which is most commonly seen, known as a loafer, slippers, or penny loafers in American culture, has a moccasin construction. One of the first designs was introduced in London by Wildsmith Shoes, called the Wildsmith Loafer. They began as casual shoes, but have increased in popularity to the point of being worn in America with business suits. Another design was introduced as Aurlandskoen in Norway.

A dress shoe is a shoe to be worn at smart casual or more formal events. A dress shoe is typically contrasted to an athletic shoe.