I have found eventually what I was looking for a long time.
This one is the best I have ever had for my back. I have tried many brushes from other manufacturers and they were terrible: you need to put a lot of soap in and then spend hours to take it back from there, cracked handles within 2 weeks, etc. This one is rock-solid so far (2 months); I will buy some more soon, a great product, really.
Rating: 5 stars