For optimal dental health and brush performance, your PearlBar Sonic Electric Toothbrush head should be changed every 2-3 months. When it's time for a refill, our bamboo brush head variety pack is the perfect solution. It comes with one each of our three customized professional-grade brush heads so you can give your smile exactly what it needs every time you brush. Tynex Dual Action: The Enamel-protecting Superstar Two types of bristle combine to give you your most thorough professional clean yet, removing plaque and debris to reveal and protect healthy enamel. Binchotan Charcoal: The Whitening Crusader Luxury Binchotan Charcoal infused bristles are completely non-abrasive and are renowned for their ability to absorb toxins and impurities from teeth, gums and oral tissue. Spiral Extra Soft: The Sensitivity-reducing Softy For the times when you need a gentle touch, such as after dental work or when brushing the tongue or gums, our extra soft spiral bristles provide the ultimate comfort clean.