These heel inserts help to treat a wide range of heel and other foot related issues. Not only do they help those with leg length discrepancies, but they are able to help those suffering from heel spurs, achilles tendonitis, and raise the heel for lower-limb swing-through and improved gait. Shipped with 2 stackable layers and 2 pieces of double sided tape, you can attach and remove layers as needed, along with ensuring that your heel stays put, to adjust the heel to fit your needs and provide you with loads of comfort. For all of your heel related needs, this product will ensure that you're well taken care of and that your heel pain or issues will decrease over time or even disappear.