The reason that they're called Air Rift is a tribute to the barefoot running techniques of athletes in the Kenyan Rift Valley. The split toe design is supposed to replicate this.
As I walk a great deal these sneakers have really started to stink. I spray them with deodorant and wash them in the machine after two wears, but they're pretty ripe. I decided to remove the insoles as pictured and use them as a template for cutting out some replacement memory foam ones. They were quite comfy to and from my walk to the post office where I sent off an eBay shoe parcel.