Featuring antimicrobial protection of the brush fibers. 2-sided bristles for ultimate bathroom cleaning. Customer Support: 9 am - 5 pm EST. Toll free: 1-800-320-8045. www.cloroxtools.com. Blue Side: Angled, stiff bristles for narrow and tight cleaning. White Side: Softer bristles for general cleaning. Clorox - committed to helping achieve a cleaner and healthier home. Antimicrobial materials, which protect against odor-causing bacteria, mold and mildew, are built into the brush fibers providing continuous protection that won't wash off, or wear away. Made in China.