These are THE BEST idea for boot/shoes!  Like all UGGS, they are lined in sheepskin, and they are warm and cozy, whether you wear them barefoot or with thick socks.  They are great for football games or outdoor events, where you need to keep those toes warm for a long time, and they are fabulous for doing errands in in the the winter when there isn't alot of snow, or after all the streets have been plowed.  They have excellent traction on icy or snowy pavement, I have them in brown and black -- you can slide them on without having to slip them over or under pant legs.  They are easy to drive in, walk in or do anything in!  I can't say enough about how great these are!