Because young children's ligaments are very loose, a child’s feet can be easily squeezed into badly fitting shoes without them feeling any immediate discomfort, but unfortunately long-term foot damage can occur. Shoes that are too small can squash toes or encourage bunion joints to develop. Those that are too big mean the child has to grip with their toes to keep them on, which leads to a condition known as "claw toes”. A properly fitted shoe should support the arch and be unrestricted around the toes, allowing them to splay on contact with the ground, which is what happens while walking. A child’s first shoes should be soft-soled so the foot has to work a little bit harder to provide support. With later shows leather uppers and breathable liners so all the running about children do lets the moisture the foots sweat glands produce to escape.