Shoe review: Nike Epic React Flyknit
New foam technology makes Nike Epic React Flyknit for a better running shoe with great balance
The four pillars of a running shoe are cushioning (for comfort), energy return (for feedback from the running surface), light weight, and durability. The biggest challenge is the foaming material used beneath the foot: It should be soft and still provide ideal feedback. A slightly harder foam would offer energy return, but would not be as comfortable.