Toddler Girls' Calista Slide Sandals – A slider is actually a form of footwear distinct from shoes and comparable to flip-flops. They are backless and open-toed, primarily an open-toed mule. Generally, all slides are sandals. Thongs and flip flops are usually labeled individually. Slides could be high-heeled, flat-heeled or somewhere in between, and may cover around the whole foot from ankle to toe, or could have only a couple of narrow straps. They usually consist of a single strap or a sequence of straps over the toes and the lower half of the foot to hold the shoe on the foot.