MBT Shoes Kisumu Sandal - Unisex Masai Barefoot Technology will strengthen muscles, burn calories, and improve posture. The worlds first physiological footwear. Join the revolution. The MBT sandal has all the technology and benefits of MBT shoes, but in a stylish, comfortable sandal. Perfect for those hot summer months or wearing inside during the winter, MBT sandals create a smooth and easy fit