whitening, eco-friendly, soft
I bought these because they are made of bamboo, but found they clean better than my prior oral-b toothbrush - likely because of the charcoal bristles.  I was shocked by how well the toothbrush whitened my teeth over the 2 - 3 months I've used it.  I love this toothbrush so much I've given a few to friends (it comes in a pack of 8).
Rating: 5 stars