I'm not a professional stylist but I have been dyeing my hair for like 30+ years, since I was ten and discovered manic panic in the 80s. If you dye your hair, then you know that trips to the salon every two to three weeks for root touch-ups can be difficult -- on your schedule and your wallet. The trouble with every dye brush that I've ever seen/used, is that the bristles are super hard and separated by sections making it challenging to get the dye evenly distributed throughout the roots, especially in the back. They push the dye against the hair instead of nestling the dye evenly in and around each root/strand. JenJo brushes are a legit hashtag SUPERHERO PRODUCT. The bristles are soft but firm with no separation, guaranteeing even coverage against the hairline with little to no energy or fuss. The two sizes allow you nuance and even saturation. The comfortably designed handle makes it easy to get into those difficult to reach places without straining your fingers/hands/wrists and the straight tip at the end is a snap to section/comb through the hair. I don't think that I've written a review on Amazon, but these brushes are so incredible, I just had to shout it out. Love on top of love these brushes!