Patented technology utilizing the signature 7-layer Personalized Comfort System (PCS) - 3 removable PCS dual-density comfort adapters in the midsole wedge Superior arch support with Removable cushioned insoles featuring gel inserts for added protection Functional side zipper, Durable fabric uppers, Durable rubber outsole Approved by the American Podiatric Medical Association Shoe fits small. For a roomier feel consider ordering 1/2 size larger Therafit's Sienna is our newest model in sports wear shoe trends! With superior arch support, deep heel cups and removable socklining insoles that lift and support your foot. Featuring a functional side zipper and durable fabric uppers in cool colors and prints, this sport line can be worn for any occasion in comfort and style.Therafit Footwear products are designed for optimal support and cushioning with the goal of providing you with reliable comfort, protection and relief from arch pain,heel pain, plantar fasciitis, pronation and other foot pain symptoms. Shoe fits small. For a roomier feel consider ordering 1/2 size larger.