Hedrin Treat & Go Mousse 100mlHedrin Treat & Go is the easy, no fuss way to get rid of head lice and their eggs. It's light, non sticky and spreads quickly and easily on the hair and washes out easily too. It contains Activdiol 5% which is not a chemical poison. Its works by a physical process which effectively disrupts the outer skin of the louse and causes it to dehydrate and die. Hedrin Treat & Go can safely be used as often as required without lice developing resistance.