What is felted soap? It is our famous goat milk oatmeal soap made with organic food ingredients that has an added merino wool sweater that shrinks as the soap is used. It's exfoliating, makes the soap last longer, and keeps the bar of soap from slipping out of your hand. The felted sweater replaces synthetic sponges, and plastic bath scrubbers & poufs. It is made from a combination of merino wool & silk fibers. Completely biodegradable. Keep it in an airy spot so it can dry completely. Once the soap is done you have a nice natural bathtub scrubber! Soap weighs appx 4oz. Size of soap varies as these are both rectangle & square are sizes - it depends on what I have available for felting. The color of the sweater on the soaps will also depend on the wool that is available.