This Foreo ISSA Replacement Brush Head in Lavender is made from medical-grade silicone and is compatible with ISSA electric toothbrushes (except the ISSA micro/play). This brush head removes plaque, stains and prevents tartar build-up and cavities, while it gently massages the gums and prevents over-brushing. Ideal for users with sensitive teeth and gums. This ultra-hygienic brush head lasts for 1 year.