Puma’s radical new carbon racer claims to knock 4 minutes off your marathon PB

Puma launched Fast-R NITRO Elite 3 racing shoes.

Puma has launched its most advanced race-day running shoe to date, the successor of the boundary-pushing Puma Fast-R Nitro Elite.

Backed by biomechanics research and debuting at the Boston Marathon, the Fast-R NITRO Elite 3 promises to do more than just look fast: it could help you knock more than four minutes off your marathon time.