Sooo comfortable. Its just compressed felt and a little bit of thread where the zip toggle should be. But then again, you have a volume button. Overall nice quality and impressive runtime. So comfortable and beautiful! Narrow all over, you can barely see the soles when my daughter is wearing them, but she likes them. I have narrow feet and these are almost too tight and slightly painful when I?m working out hard, but I think they will relax a bit once they are broken in. Great during my workouts on the tred mill. We opted to not screw it into the wall, as it seems safe enough without that. Good spices can range from $3 and up.