Mop heads for washing to be used with the specific frame. They are made up of 70% polyester and 30% cotton. They can be washed at 90° and are guaranteed for 300 washings, if washed with a delicate detergent and dried naturally; bleach and dryer are highly unadvisable. The buttons on the little wings are used to stop the mop head to the frame. Available in the cm 40x11 size.