Why the heels, toes and souls of your feet require a special kind of cream��The heel, toes, and bottom (sole) of feet are extremely brittle and prone to cracks, sores and calluses when dry. This is because in these areas of the foot the outer layers of skin can be up to 40 times thicker, and difficult to hydrate. DiabetiDerm Heel & Toe Cream gently penetrates this extra-thick skin and delivers much needed moisturizers, softening, and healing agents.