The supinator is great. These shoes are for overpronators only. It offers extra space in the toe area. Some people will feel the shoes are too big. .These 940's are built on a SL-2 last that offers extra room in the toe box. They have much stiffer arch support. Might be too much for the average foot. Don't drop your feet. They are also suitable for orthopedic insoles. Keep in mind that they are slightly wider in the toe compared to the 990s.