When walking in nature it is important to keep two things warm - the feet and the head. Cold passes through the feet and up the body creating chill. Stop the chill with felt shoe inserts and walk carefully in nature. In order to enjoy the outdoors, I need to be warm. When I discovered felt shoe inserts, I found I could walk for hours in calm, there was no reason to turn back. Made by hand in Sweden, my original pair has lasted me 10 years thus far, I keep adding on for the various shoes. Once a year, I soak them in cool, soapy water, press the water through, squeeze them out and hang them dry, preferably in the sun. Refreshed!