
Valenki were loved in Rus'. They were not only among the common people, but also the highest persons wore them. There is information that when Peter I had a hangover, the first thing he did was put on his felt boots. And for good reason. Sheep wool, warming the feet, dilates blood vessels, restoring blood circulation throughout the body. By the way, Catherine II also ordered special combs for herself. Soviet government officials did not disdain them either. As for the current leaders of the state, many of them wear felt boots when hunting and at the dacha.
From time immemorial, only felt boots were worn by Russian soldiers in winter. They say that it was their shortage that led our army to defeat in the Finnish war. But the victory over Napoleon and Hitler, on the contrary, was largely predetermined by a sufficient number of felted products.
Village elders, who don’t take off their felt boots even in summer, assure that if a child wears felt boots at least until the age of 10, he will never get sick again. They exaggerate, of course.
Nevertheless, felt boots really help with various ailments.
The natural sheep wool from which they are made perfectly absorbs moisture while remaining dry. This is the kind of dry heat recommended for colds. 
It is no coincidence that lanolin, an animal wax contained in wool, is used as a base for medical ointments. It soothes rheumatic, joint and muscle pain. Indicated for osteochondrosis, orthopedic, bronchial and allergic diseases.
Sheep wool accelerates the healing of wounds and fractures and prevents inflammatory processes.
Dry woolen warmth relieves nervous tension.
Shoes on bare feet are indispensable when tired feet buzz and ache.
Felt shoes have a beneficial effect on male potency.