Good and cheap, I recommend it.

So crazy, i know, but i’m gonna use this to brush the marginal gingiva/cervical crown area on my maxillary anterior teeth because my gum recession keeps getting worse due to autoimmune disease and even using sonicare with the sensitive toothbrush head is causing recession, tried gum post surgical toothbrush which is the softest you can get and still continued recession so this is my last resort to maintain my gum tissue as much as possible prior to grafting.

I haven't tried them yet but they seemed okay.

Pet Silicone Finger Toothbrush