Very Hard, Stiff Bristles
Too bad these "Compact Brush Heads Compatible with Philips Sonicare Diamond Clean Toothbrush - 4 Pack" have bristles that are VERY hard/stiff!  Although these brushes were listed to fit my Sonicaire FlexCare, they are not a good fit. The brush wobbles even though it's pushed all the way onto my toothbrush. Too bad Philips no longer makes compact brush heads for their Sonicare toothbrushes for adults.
Rating: 2 stars