Lightweight, high-performance road shoes with unparalleled power transfer, benefitting from S-PHYRE trickle-down technology Upgraded upper pattern and material improves fit and breathability, while reducing weight,Surround wrapping upper structure reduces overlap, providing a glove-like fit and eliminating hot-spots,Super low stack height helps stabilize foot, maximizes power transfer and efficiency,Integrated sole and upper construction sets a new level of fit, stability, rigidity and lightweight performance,Mesh/TPU/Synthetic leather composite upper provides comfortable fit and better breathability,Light carbon fibre reinforced nylon sole for power transfer,BOA® L6 skeleton dials ensure precise fit and comfort,Weight: 240g (size 42),Stiffness rating: 7.