We take care of all your aches and pains. These wraps can be put in the microwave for some nice relaxing heat, or in the freezer to cool things down! They come either non scented or scented for a little aroma therapy. Scents such as lavender, peppermint, eucalyptus etc. You can use them anywhere, there is a bigger square that is most commonly used on the back, a smaller rectangular one most commonly used around the neck and a small square for places such as knees and elbows. But they don't have to be used on the most common places! They come in adult size and child size.