Single ply cotton hat with knotted top. 100% Interlock Cotton. 6.1 ounce interlock, ring-spun, combed cotton ensures that your clients are purchasing the highest quality for a great value! Popular for right out of the hospital. These caps are also great during colder seasons or at nighttime. The stay-on quality matched with the traditional knot appeal makes this item a hit with customers. Recommended fitting is from 0 to 9 months.