Concentrated comfort for those who prefer a partial insole or are concerned with a tight fit especially in high heels. The leading performance replacement metatarsal pad featuring 100% Sorbothane for outstanding foot-strike protection. They are so effective that they have been approved and recommended by the American Podiatric Medical Association. The Rx Sorbo Ball-of-Foot pad works well in all types of shoes and for all types of activities and sports. These concentrated pads fit perfectly into tight spaces like in dress shoes, high heels, golf shoes, dance shoes and flats. Sorbothane is the only insole-material that absorbs up to 94.7 percent of impact shock; and unlike standard insoles, which can bottom out, compress and lose effectiveness; the Rx Sorbo Ball-of-Foot pad retains its support and comfort, month after month. Sorbothane rubber was developed to simulate the soft padding of the heel. This makes it the most comfortable and best cushioning insole rubber available. Unlike foam rubbers it resists becoming hard or flat over time and lasts much longer that other insoles. Rx Sorbo Insoles are proudly made in the USA at our factory in Kent, OH. For more information please visit www.rxsorbo.com. So why exactly are Rx Sorbo insoles MORE THAN JUST INSOLES? The main reason they are NOT made of simple and gimmicky foam or gel like most insoles. They are made of an advanced VISCO-ELASTIC material available, called Sorbothane. Sorbothane is the leader in vibration isolation. It is the same material trusted by NASA, NASCAR and countless other agencies and companies for their vibration isolation needs. Rx Sorbo Insoles are recommended by Dr. Mark Mendeszoon. Mendeszoon is a Board Certified podiatrist who treats all types of surgical and non-surgical conditions of the leg, foot and ankle. He has trained athletes from the high school level up to current Olympic medalists.