A team of Canadian researchers don't think cleats and studs are the way to go when it comes to winter boots. In fact they've developed what they believe are superior alternatives: ones that use minuscule bits of glass instead. The team has designed boot soles embedded with glass particles than can grip slippery surfaces and yet feel like regular rubber on ordinary flooring. These particles give the soles a sandpaper-like texture, with each one acting as a microscopic stud. To make sure their creation provides enough grip, the researchers test their prototypes in a self-contained room with smooth, tiltable floors.