a lot of you remember it as sno pa pock lips. . all of that snow shut down retailers before christmas. holiday shipments were held out. travelers were stranded. some churches cancelled services for the next day. walking this winter can be dangerous. >> a lot of those winter boot wes love don't help with the traffic traction. >> dressing for winter means lots and lots of layers. when it comes to icy conditions, all those layers become this is the time of year emergency room doctors see a sharp increase in people getting hurt after falling on ice. >> a lot of broken bones. wrist fractures are more common with the icy weather. >> who better to address this slippery situation than our neighbors to the north. canada, of course. >> we'll go out and put on snow tires in the winter or at least in this part of the world we do. but no one gives much about the shoes. >> this is the winter lab at toronto rehabilitation institute. researchers are slipping and slide iing in the name of scien. they have tested 98 boots on how well they do on ice.