The men's KINVARA 11 by Saucony is Boston's finest boiled down into a lightweight, fast, flex runner that'll propel you to personal bests. PWRRUN cushioning is responsive and floats like a feather - perfect for longer distances. The flexible sole construction pushes off and lands with quick transition. FORMFIT is a comforming tech to your foot for a better fit and feel. The Flexfilm overlay reduces the bulk and weight while maintaining a solid structure.