Yaktrax makes various traction devices for most footwear types. The company has a run-specific model that includes 1.4-millimeter steel coils beneath the midfoot and heel and carbide steel spikes beneath the forefoot that's compatible with all running shoes—just be sure to buy the correct size. We also like Black Diamond's Distance Spike Traction Device, which includes a softshell toe cover for additional weather protection and a secure fit. You can put studs on most running shoes but err toward those with thicker soles (and, ideally, a rock plate). Use three-eighths inch hex screws for sheet metal and place them away from the midfoot and the ball of the foot. Some shoes, like Saucony's Peregrine 11 GTX, have markings showing where to put studs.