Tough Bristles For Grout, Soft Bristles For Tile Iron Shape For Easier Scrubbing Stands Up For Faster Drying Safe For You - Non-Toxic Earth Friendly Materials B Corporation Certified Tackle your tub with a brush that combines tough bristles for grout on the inside and softer bristles for tile on the outside. Curved handles lets you get down and dirty with less effort. Safe For You - Non-toxic coating on bamboo Earth Friendly Materials - Bamboo, recycled plastic Intentional Design - Hangs or stands on end for easy storage and quick drying.