Fast-R Nitro Elite 3 Unisex OS1st Socks with Purpose are

OS1st Socks with Purpose are designed for just that reason

Less short

Full grain leather upper

Tops of toes

Pebax® spike plate offers secure traction and keeps weight at minimum

Fast-R Nitro Elite 3 Unisex OS1st Socks with Purpose areFast R3 is the fastest running shoe Puma ever made data back, lab tested, and built for breakthroughs. After testing it on elite runners and real athletes, they digitally engineered and optimized the product fully based on data. Fast R3 is designed to shave minutes off your race time. With its 3. 15% improved running economy*, this translates to an unprecedented potential marathon time saving of more than 4 minutes and 30 seconds, for a 3 hour