This is another hair product which is talked about so much by beauty bloggers and I decided to also give it a go. The whole point of this shampoo is that you use it once a week to really give your hair a deep cleanse. Especially if you like dry shampoos or generally use lots of hair products between hair washes quite often you can get a build up and regular shampoos don't always remove all that heavy build up. I found that this Bumble and Bumble Sunday Shampoo really cleansed my hair thoroughly leaving the scalp feeling super fresh, especially after I had a ton of the Bumble and Bumble Hair Powder, I used the White one on one day and next lots of the Blondish. If you haven't read that review yet click here!