Keen Whisper Slide Sandals On Sale – A slider is actually a form of footwear different from shoes and much like flip-flops. They’re backless and open-toed, basically an open-toed mule. Generally, all slides are sandals. Thongs and flip flops are typically labeled individually. Slides might be high-heeled, flat-heeled or somewhere between, and could cover approximately the entire foot from ankle to toe, or could have only one or two narrow straps. They sometimes include a single strap or a sequence of straps over the toes and the lower half of the foot to hold the shoe within the foot.