The Spa Sponge is a sponge on one side and an effective scouring tanned fiber on the other. Made from crushed walnut shells to clean the toughest of dirt and scum without scratching the spa surface. Washable and reusable. Measures 75mm x 150mm.
We have tested these on several fibreglass & acrylic spas, including our own. We always recommend testing it on a conspicuous are before using. Ensure that it is kept clean, as embedded dirt can scratch some surfaces.