Kahtoola NANOspikes Footwear Traction Ultralight and low profile winter traction device Evolved spike design bites into icy sidewalks and roads 10 Tungsten Carbide spikes per foot on all sizes Weight Per Pair: Extra Small 7.2 oz., Small 7.5 oz., Medium 8.0 oz., Large 8.3 oz., Extra Large 9.0 oz. Please refer to Kahtoola sizing chart included in product images. 1 Year Warranty. Shoes not included.