Our soap bags are 100% cotton and are made by us here at Willowisp. Each bag comes with a drawstring and a wooden sliding bead. Hang it up by the drawstring between uses so you can dry out your soap and extend the life of your bars. The soft cotton yarn is perfect for gentle scrubbing and the bags are machine washable. Some of the white yarns are also color changing! They change to yellow or pink in the sunlight. Options are shown in pictures and are listed in the drop down box. Camo bags and scratchy bags are made with acrylic yarn.