Very well-made thermal sole with somewhat more complicated operation

The soles are very well made. The red fabric feels pleasantly, under it there is blue foam, the date remains stable. It is possible to trim the sole. For this shoe sizes of 35 to 40 are drawn. But to my surprise the sole fits in the delivery condition of my foot, although I normally about size 43 - have 44.

The main shortcoming is, in my opinion the right instant replay button: At the rear end of the sole is an indentation where the socket for charging cable and the on / off button is. This is sized very small with about 2 mm wide. Without the systematic manual is not clear, because the button must be pressed long and the two modes can be adjusted by other button pushes on and off. A red light indicates the current device state. A little complicated. To set the sole of course, must be taken out of the shoe also, here a remote control would certainly be a more viable solution.

The sole at the heel with 1.7 cm also quite high. Consequently, the original deposit must be seems to be removed from the shoe, otherwise it could be tight. Otherwise, running with the soles is a bit unusual, but quite comfortable. The heat output is very good, the feet remain warm in very cold weather. Too hot the soles were not my feeling.

Charging with two to three hours is a long time, but just the battery but also a few hours off.

All in all, a recommended solution for cold winter days.