NWT Pet and smoke free home The understated Saka men's performance sandal is the ultimate warm weather adventure machine, engineered for real-life wear in all conditions including boating, walking and outdoor recreation, with materials that won't wear or take on odor even when wet. Each pair of Masai Barefoot Technology (MBT) Shoes comes with an insole made from high quality foam creating a layer of orthopedic padding that provides extra cushion with every step. This along with the MBT patented heel sensor helps to reduce impact on knee and hip joints making them ideal orthopedic shoes.