Formthotics are a standard fit providing proven arch support and a deep heel cup for rigid support in all shoe types. Original Single Hard Formthotics are complete length orthotics with hard Formax foam to provide solid control and stability in the original, trusted Formthotics shape. They are lightweight and durable enough to wear everyday. Formax foam is antimicrobial, which means it prevents the growth of bacteria and fungi which causes foot odour. Formax™ is thermoformable and should be heated and fitted by a medical professional.