First off let me say that I've had several different pairs or many of the Go Run shoes over the years and this is the first time I've tried this Go Bionic Fuel,  they are awful.  All the other shoe lines are nice and flexible and made of a highly breathable material to keep your feet dry while out running.  Well not this pair, it is covered in a plastic material on about 50% of the shoe so my feet are warm and sweaty even while walking in them and they don't flex well at all, no wonder they were on sale for $25 (hopefully it's a discontinuation sale).  So needless to say I absolutely cannot use them as a running shoe, I brought them to work and figured they might be a decent work shoe at least.  Nope, they are hot as hell after just a couple hours of having them on.  Plus they are ugly as all hell compared to the other Go Run lines.