Puma claims the Fast-R Nitro Elite 3 is its "fastest ever running shoe," primed for use in the London and Boston marathons.

Nordstrom Rack is packed with spring shoes from popular brands like Sorel, Crocs, Havaianas, and more. Included in the ...

The Fast-R Nitro Elite 3 claims to offer the biggest improvements in running economy since the Nike Vaporfly took the world ...