The ULTIMATE Pre-Molded Orthotic design is the culmination of over 22 years of clinical experience and thousands of patient studies. The FRELONIC composite material provides a high level of support and stability. It is 50% thinner and is lighter in overall weight compared to traditional materials used in other orthotics. The ULTIMATE Pre-Molded Orthotic is top covered with CELLFLEX foam bonded to MICRODRY, which is a high-tech fabric that is designed to reduce friction and its byproducts, heat and moisture. This ULTIMATE Pre-Molded Orthotic is three-quarter length standard width. The orthotic that provides you with greater comfort and a comfortable fit: Greater resistance to pronation Reduces pain associated with Plantar Fasciitis Excellent arch support Moderate heel cup for a comfortable fit Biomechanically tested Superior shock absorption MADE IN THE USA While the Rear Foot posted model provides greater stability for patients who indulge in physical activities, Non-Posted model is for greater shoe fit.