IPR3030 Pressure Relief Insoles.  If you have sensitive feet that require extra cushioning, use the IPR 3030 Pressure Relief Insole. A top layer of Plastazote memory foam molds to your foot. The soft contoured polyurethane footbed supports both the longitudinal and metatarsal arches. Men’s whole sizes from 4 to 16. Women, please order two full sizes smaller than your normal shoe size.