Size: S M L XL Shoe size: 35-37 38-40 41-43 44-46 Heel pad made of high-strength medical silicone. Provides uniform pressure distribution thanks to the different silicone densities it has. The blue silicone in the center of the heel is softer for proper support of the heel spur. It relieves pain and reduces pressure on the joints of the spine and Achilles tendon. Package 2pcs