DESCRIPTION OF THE SALOMON F4.0: 
Low profile, high technology: The F4.0 is ball: ultralight, very low profile and ergonomic shape. On the menu: the ultra-fast Wrap Lock lacing system for a perfect fit without the slightest pressure point, the Fusion Exhale liner and the Aero outsole. Result: the thinnest profile ever! You don't have to take our word for it, but ask Bode Merrill and Josh Dirksen what they think ...