Formthotics has original single firm model. The colour will blend seamlessly into most business footwear, and they are lightweight and durable enough to wear everyday. This type of product has a one of the most popular models. Original single firm formthotics are complete length orthotics with firm formax foam to provide control and stability in the original, trusted formthotics shape. Formax foam is antimicrobial, which means it prevents the growth of bacteria and fungi which causes foot odour. They are a standard fit providing proven arch support and a deep heel cup for firm support in all shoe types. Formax™ is thermoformable and should be heated and fitted by a medical professional.