This Foreo ISSA Hybrid Brush Head combines the gentle touch of medical-grade silicone with the effective cleaning power of durable PBT polymer bristles. Designed for superior oral hygiene, the hybrid structure ensures thorough plaque removal while remaining gentle on gums. It is an essential replacement component designed to integrate seamlessly with your existing Foreo ISSA electric toothbrush, maintaining optimal performance and hygiene standards for your daily brushing routine.