The Nitty Gritty Nit Free comb was designed by a group of mothers who no longer wanted to use unpleasant chemicals to remove head lice from their children. This comb has 33 round tipped teeth which goes through the hair very easily and each one of the micro-spiral grooves gently removes anything that’s attached to the hair such as lice, nits and even un-hatched ‘live’ louse eggs