Mule is a style of shoe that has no back or constraint around the foot's heel. ... Mules have a history going as far back as Ancient Rome, even though they were not popularly worn until sixteenth-century Europe.

What is the difference between a slide and a mule?

Slides are open-toed, backless flats. Mules tend to have closed toes, and their heel heights range from low to vertiginous.

What are flats without backs called?

Flat Mules

Another flat shoe that is also available as a high-heeled version, mules are a type of backless shoe and often closed-toed. ‍Mules show off a lot of skin at the back of your foot, so they must be worn without socks to be flattering.