Winter runners delight! You can now stick to that winter training plan thanks to Kahtoola NANOspikes. Offering incredible grip on icy sidewalks and trails, these simple looking traction devices give you no excuse but to run. . NANOspikes are ideal for walking, hiking, and running on snow packed trails. New ergonomic elastomer harness is thinner and lighter than ever without sacrificing strength or durability and stretches over the entire foot more uniformly for improved comfort. Overmolded eyelet technology permanently fuses the stretchy, flexible elastomer material to a harder polymeric insert for greater durability. Eyelets are set further into the harness to increase durability and create a more streamlined fit that better conforms to the contours of any shoe or boot. Entirely new spike design features tungsten carbide studs with stepped and tapered shock absorbing cleats around them the studs offer superior wear resistance and unrivaled bite into ice while the cleats effectively engage other types of terrain. Ten 0.21 inch spikes per foot ensure complete slip resistance textured bottom enhances traction on non icy terrain. Upward Traction technology is comprised of multiple small cleats that grip your shoes tread to effectively keep NANOspikes in place. Low profile design encourages a comfortable, natural stride. Hinged front plate flexes with the foot for enhanced fit and durability. Built in Snow Release system sheds snow with each step to avoid balling. Glove friendly with no buckles or straps to tighten.