Konjac heart sponge - lavender natural japanese sponges are made of vegetable fibers of konjac root. these natural and biodegradable facial and body cleansing sponges have a very soft texture. the konjac sponge has been used in japan first as a bath sponge for newborn babies for more than 100 years because of its soft texture. due to the popularity the konjac sponge has been on the rise as facial cleansing and bath sponge in china, southeast asia and europe. 100% natural & biodegradable, handmade konjac fibre and ancient japanese beauty secret