Aetrex Fiji 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 Fiji Flips you'll feel like you're walking on air and enjoy the most comfortable footwear experience on earth. Waterproof. Arch support helps to stabilize and align feet and also helps to relieve common foot pain & plantar fasciitis. The memory foam foot-bed provides cushioning & comfort.