I recently ordered three pairs of Ultraboost running shoes. A Sparkasse, a DNA and these 19ers. I also had several previous generations of similar technology (outsole wise). Ultraboost shoe soles are incredibly comfortable in every way. However, this particular design tends to cut into my leg and threatens to cut off my circulation. Of course I tried loosening the laces a bit but found that the problem persists. The shoe simply lacks a tongue, so the laces practically suffocate the bare foot. I like other Ultraboost shoes but these are almost unwearable. If I could do it again I would NOT buy this design and would recommend Ultraboost shoes but NOT this model.