Slip-ons are typically low, lace-less shoes. The style most commonly seen, known as a loafer or slippers in American culture, has a moccasin construction. First appearing in the mid-1930s from Norway, Aurlandskoen (Aurland Shoe), they began as casual shoes, but have increased in popularity to the point of being worn in America with city lounge suits. They are worn in many situations in a wide variety of colours and designs, often featuring tassels on the front, or metal decorations (the 'Gucci' loafer). A less casual, earlier type of slip-on is made with side gussets (sometimes called a dress loafer). Made in the same shape as lace-up Oxfords, only lacking the laces, elasticated inserts on the side allow the shoe to be easily removed, but remain snug when worn.
Contributions by Kan8eDie, Jojalozzo, and Erik den yngre.