Moleskin is an inexpensive flannel-type material backed by adhesive. A nice accessory to have when camping. It is called "moleskin" because it is soft, like the skin of a mole. There are brand names, but all are equal. I purchased these small pads for .99 U.S. in a discount store. When hiking, or breaking in new shoes/boots, blisters tend to develop. Before this happens the skin develops a red "hot spot", which can be identified by removing shoes and socks every few miles and examining your feet. They tend to be more of a problem if you have bunions or corns. Cut a piece of moleskin and place it over the hotspot. One side will be soft and it will be backed by adhesive. Then put the sock back on. This will cushion the area where there is pressure.