Aetrex Maui Flips are made from UltraSky injected EVA to provide extreme cushioning, shock absorption and durability. The toe post that can be so uncomfortable in so many flip flops, is specially designed with super soft foam to keep your toes comfortable all day long. With Aetrex Maui Flips you'll feel like you're walking on air and enjoy the most comfortable footwear experience on earth. The Aetrex Cobra Orthotic System is Built-In to every pair: Arch support helps to stabilize and align feet Arch support helps to relieve common foot pain & plantar fasciitis Support pod to help relieve forefoot pressure UltraSky EVA Foam to cushion and provide superior comfort Contoured rearfoot to cradle your heel and relieve pressure