Arion PZ472M PerFeet 100% Silicone Heel-neutral Heel Inserts - Size- Womens -Medium by Arion. $36.95. Color may not be as shown. Innovative - will enhance your well being.. PerFeet 100% Silicone Heel-neutral Heel Inserts. Sold per pair.With an aging population, steady increasing diabetic population and an increase in wealth and foot care awareness the need for preventative and supportive foot care products like PerFeet is ra. Save 26%!