Closed back clogs are a style of clogs that are closed toe and there is a small edge to the back of the shoe or a backstrap piece to hold the shoe in place. The soles of clogs are typically made of wood, rubber, or molded plastics. Clogs may have a variety of materials for uppers. All clogs are slip-on shoes. Clogs can be a variety of stylings ranging from athletic, to dress, or casual influences.