Amazing shoe, bought the wrong size on a final sale :( upper: chrome free leather / inner lining: felted wool (grey) / sole: natural rubber light materials, with one shoe weighing less than 182 grams. The sole is flexible in all directions, with no movement restrictions. Each shoe is handcrafted with natural materials and ecologically dyed. Mukishoes run true to size for most people, so you can start with your usual shoe size as reference, but measuring is the best. If you plan to wear thick socks in them, measure your feet with them to choose the right size. CARE INSTRUCTIONS: gentle hand wash. Being barefoot is natural and healthy. walking barefoot builds and strengthens the muscles in our feet, having a positive impact on our entire body structure. This makes Mukishoes a healthier alternative to the ususal stiff, hard and restrictive conventional footwear for kids and grown-ups. Due to the 3.5 mm thin, but protective sole, the foot can feel the different types of ground that it steps on. This stimulates the peripheral nervous system, as well as the reflex zones of the foot, increasing general health and well-being. No drop from heel to toe to allow a forefoot strike, the natural way of running barefoot. Long-term problems, such as knee and hip pain created by incorrect running postures can be avoided. Mukishoes wrap around your feet instead of shaping them. The wide toe-box follows the shape of a natural healthy and muscular foot. Body balance will be improved.