Don't let winter weather derail your running routine. The Kahtoola Nano Spikes transform any pair of running shoes into ice-conquering machines, delivering serious traction on icy streets and sidewalks without the bulk of traditional winter footwear. Ten ultra-durable tungsten carbide spikes per foot bite into ice with confidence-inspiring grip, while the enhanced thermoplastic elastomer harness slips on and off your favorite running shoes in seconds. Whether you're logging miles through the city or exploring urban trails, these lightweight traction devices keep you moving safely through slick conditions, freezing temperatures, and those darker winter runs when every step counts. Features Concave spike profile for instant engagement on ice surfaces Enhanced thermoplastic elastomer harness geometry provides secure fit across various running shoe types Integrated toe bail design reduces pressure points and secures shoe during descents Center plate ridges enhance grip and stability on uneven ice and snow Directional lugs optimized for improved traction during ascents and descents Low-profile rivet connections minimize pressure points against shoe Easy on-off operation with improved heel tab design Purpose-built for hard surfaces including streets and sidewalks Specification Value Weight 181 g (6.4 oz) XS | 238 g (8.4 oz) XL Packed Dimensions 5.75 × 4 × 2.25 in | 14.6 × 10.2 × 5.7 cm Packed Volume 52 cubic inches Spikes per Foot 10 Warranty 2 years limited Materials Tungsten Carbide Spikes | Thermoplastic Elastomer Harness | Rivet Connections