Oka b owes its sleek, contoured design to designer Naomi Wakatake's background in sculpture and interior design. Her elegant concepts add a fashionable dose to flip-flops that are durable, tailored to fit feet well and feature a massaging foot bed. Made from Microplastâ€”a material that's both lightweight like plastic and has the flexible, non-slip qualities of rubberâ€”Oka b's shoes are anti-microbial and machine washable. One-piece construction makes for an ergonomically sound form that promotes proper weight distribution and theraputic beaded surfaces on the insoles and toes claim the healing benefits of reflexology. Our favorite, the Spa Thong (pictured) is $20 from Oka b.