You apply moleskin to any "hot spots" you might get on your feet. I've brought it several times and never had an occasion to use it. Before I started wearing my
Crocs" all day, everyday, at WDW, when I started to get a blister I used Bandaid Blister Bandaids. They worked great and stayed on for several days. Since I started wearing my Crock, I haven't need to do anything special.
Hope this helps.