Two years I'm fighting with lice using all shampoos most inefficient as each other and electric comb. These combs one (Goodbye Lice) are formidable: the big yellow comb helps detangle gently, then the little yellow combs allow to catch all the lice, big and small. Violet comb meanwhile has not proved effective on slow ... because after its passage, I could always find a few. All these combs are very strong and allow us to see at a glance caught lice: they are far better than the various metal combs that can be found in pharmacies. Much better as the electric combs that are neither strong nor effective. The document inside the box to understand the life cycle of the lice and thus, calculating well the days when you have to go combs, one gets rid of all the fine lice.