This replacement brush head for the FOREO ISSA toothbrush features a unique hybrid bristle design, combining soft, medical-grade silicone with durable PBT polymer bristles. This construction ensures effective plaque removal while remaining gentle on gums. Ideal for maintaining optimal oral hygiene, the design promotes long-lasting performance and is easy to attach and detach from your existing ISSA device. The innovative combination of materials provides both superior cleaning action and hygiene benefits.