The Saucony Fastwitch 4 is the latest in the Fastwitch performance range from Saucony. It's lighter than it's predecessors making it a great performance shoe but it still features the mild support which is great for the later stages of a triathlon, marathon or Ironman. A very lightweight upper reduces irritation as the foot flexes and a beautifully soft inner that makes it ideal for triathlon as well as performance running.