The skeleton of a foot consists of 28 bones. The foot bones can be divided into the following groups: tarsal bones, metatarsal bones, and phalanges. 20 muscles and more than 114 tendons and ligaments provide the required flexibility and stability of the bones in relation to each other. A fine network of nerves and blood vessels supplies the surface and deeper muscles above and below the foot with energy. In short, this is why you need the new ergonomic NTT and the choice of four different sizes to find exactly the NTT that fits your foot. The new strap design keeps your feet in the right place and the new fiberglass reinforced double hook closure system keeps the entire strap closed in all conditions. The ergonomic EVA pad in combination with the footbed at the toes is the guarantee for always the right grip, optimal pressure distribution with maximum comfort. This new ergonomic NTT relieves nerve overload and prevents fatigue and pain, your feet become less tired and you stay on the water longer. The ergonomic NTT footbed in combination with the adjustable heel cushions help to reduce pressure on the heel and even prevent shock throughout the body, helping to relieve long-term foot, back and knee pain. An extra nice touch is the possibility to stick the screws of the pad to the bottom of the pad, so that you don't lose them while traveling. Step into your new slippers!