Used the Koll boot covers and they are excellent. Heavy fabric means it will last and it keeps my feet warm and dry when the snow is deep.

very warm

First outing at -17c for over two hours. My first impressions are very good. I did not get cold feet. However, the incisions for the fasteners are ok but it is difficult to put the boot on. It is easier to put on the boot cover after putting on the boots. The incisions become a bit superfluous.

I recommend it without hesitation

The boot cover is robust, effective (really retains the effect of the heat). Excellent product. Great service.