MICROspikes

Don't let winter step all over your fitness routine. With MICROspikes ($59), you'll be able to safely sprint, run or walk on any surface, from ice to packed snow to wet rocks. This slip-on traction system gets its prowess from strategically placed stainless steel spikes which attach to an adjustable shoe harness. Small enough to fit in your pocket, but large enough to keep you moving all winter.