Rough heels? Quick & easy fix!

My podiatrist suggested Eucerin Aquaphor years ago for rogh, cracked heels. I tried it immediately, fell in love with this product & have been using it since. My heels are immediately soft. It seems like its just basically petroleum jelly to me, but the jar is so huge I rarely run out so I haven't tried just petroleum jelly. The only negative is that on leather the product seems to "soak" in and change the leather.