Slip 'n' Slide
These move around a lot when you're wearing them. They're super thick, so if you're looking for a barrier to protect your heels...these will work. I wear boots all day long and the constant rubbing causes dry patches on the back of my heel. I put these on and I can't feel the rubbing anymore and it saved my heel from the constant dryness. 3 stars because they are quite uncomfortable, but that's due to the thickness. They don't stay in place if you walk around a lot, they begin to slide. Instructions also say that you can boil them to clean and sterilize, but DON'T DO IT. I only boiled mine for 2 min and they melted to pieces.
Rating: 3 stars