Plantar Fasciitis is one of the main conditions PowerStep products are recommended to treat. Our PowerStep insoles with polypropylene support shells are proven effective in clinical studies in reducing foot pain and increasing comfort. View our clinical data here. You can combine insoles with a Plantar Fasciitis Support Sleeve during the day and use the UltraStretch Night Sock for night or rest for optimal around-the-clock treatment of plantar fasciitis.