The iconic root boost hair thickening spray in a limited edition presentation a light fast absorbing hair thickening spray that lifts each root and thickens every strand suffering from flat lifeless hair help is at hand use a few pumps of root boost hair thickening spray from root to tip and then give your hair a blast of warm air to activate the thickening proteins and give roots some more oomph the result thick bouncy hair thats full of life gain instant thickness and volume from t