This eco-friendly bathroom cleaning sponge simply requires water to work, eliminating the need for detergent. Made of acrylic fiber that wont scratch or damage the bathroom surfaces, and makes easy work of removing hard water stains and other dirt. Ideal to use cleaning the bathtub. Comes in a green color. Made in Japan. Bathroom Cleaning Sponge Just Add Water For Bathtub 6x13.5x21cm Ecomagic Monster 100% acrylic/acrylique Green