It's a mystery to me. This is my third pair of Bromptons and the previous pair was very comfortable. It's very uncomfortable; Constant pressure is felt on the balls of the feet and toes. I'm only giving a second star because I've had good experiences with the Born Bromptons in the past. I was patient with this unsuitable pair as I only wore them once or twice a week. Even a shoe tree didn't help. I don't know if I can bear to put her back on her feet or give her to Goodwill.