Clarks Nikki Peridot Slide Sandal – A slider is a form of footwear distinct from shoes and comparable to flip-flops. They are backless and open-toed, basically an open-toed mule. Usually, all slides are sandals. Thongs and flip flops are generally labeled separately. Slides could be high-heeled, flat-heeled or somewhere in between, and may cover around the whole foot from ankle to toe, or may have only a few narrow straps. They sometimes include a single strap or perhaps a sequence of straps over the toes and the lower half of the foot to hold the shoe on the foot.