Puma developed this Ignite EvoKNIT with excellent upper KNIT design which is the best-in-the-class. It is specially designed for those with slightly narrower to medium feet. It features sock-like fits that completely wraps the foot to provide comfort. There is a structured external heel counter on the top that thoroughly lock the heel and offer security. The hard-wearing sole gains a boost in flexibility with the deep flex grooves. It also balances for the rather thick foam midsole to prevent from feeling too tight while running. http://www.shoetiles.com/shoes-reviews/puma-ignite-evoknit-shoe-review/