Women's Nike Vaporfly 4 Proto Trail - R8-Insert is soft TPU

- R8-Insert is soft TPU

- SPIKES IN PRODUCTION: Four replaceable spikes offer optimal traction on all track surfaces

- Infinity drawcord

resists odors

forward propulsion and enhanced traction

Women's Nike Vaporfly 4 Proto Trail - R8-Insert is soft TPUNike Vaporfly 4 Proto Women's Road Racing Shoes The Vaporfly 4 is a lean, mean, mile eating machine. We trimmed weight in the midsole, outsole and upper from the Vaporfly 3 without sacrificing performance. The result is a lighter, more propulsive all around racing shoe thats trusted from the mile to the marathon. Performance Approved The handwritten number on the midsole salutes the wear testers who put these shoes through our rigorous test process to