Kahtoola MICROspikes - Red Redesigned for 2013 with additional spikes (size XS is unchanged) Easier to use than a full crampon (you can run in them!) but still provides amazing grip and traction Thoughtfully designed upper attaches with no straps - simply pull them onto your shoes and go 3/8" stainless steel spikes are long enough to grip but not cumbersome when walking Flex chain construction prevents snow buildup and will not wear through