Good quality, soft bristles.
So far so good. They fit securely in my Diamond clean. They are much softer than Sonicare brush heads which I like. Also many dentists have told me over the years that everyone should brush with soft toothbrushes. Most people brush too hard and damage their gums. On that note I noticed that I have to press much harder on my teeth while brushing to trigger the “to hard” vibration warning on my device. So be aware that you won’t get the same warning because these brushes are softer.
Rating: 5 stars