Made of Polypropylene for better life and durability. It has good resilience and a strong leaf spring action, which provides push required in the swing phase of the walk. Can be customized using hot air gun. Thin construction allows its use inside the shoe. Anatomical shape provides good weight distribution and maintains the foot in the functional, dorsiflexion position. Top Padding is made out of durable closed cell PE foam, which is hypoallergenic, latex free non-toxic and odorless. 3D air filled cushion pad provides the required comfort and air ventilation.