Slides are a sandal in which the upper does not extend to cover the heel of the foot. The wearer of slides can simply slip on the shoe without having to tie, strap, or buckle it to secure.
About Wedge:
Wedge shoes, also referred to as wedge heels or wedges, are shoes with a triangular shape heel in the form of a wedge, with the heel and sole forming a solid block. Wedge heel shoes generally raise the heel of wearer between 1" to 3" and considered to be more stable that other types of high heel shoes. Wedge shoes come in a variety of styles, including sandals, pumps, and boots.