Men's Nucleo 2Nucleo 2: lightweight and fluid, the training tool for those who truly understand the journey. This version has been entirely re engineered to significantly enhance overall support, while maintaining the very qualities that made it an essential neutral running shoe for fluid, long runs. Nucleo 2 offers a unique mix of features, making this the foundational running shoe for every runner, whether expert or beginner. Weighing just 9. 7 oz and equipped