Slight discoloration as shown in pictures 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 Removable cushioned insoles featuring gel inserts for added protection Aegis Microbe Shield treatment to help prevent mold and bacteria Fabric mesh upper with stretch elastic gore Vegan friendly Plush, padded upper with open heel Approved by the American Podiatric Medical Association Slip resistant rubber outsole