A 5-minute treatment that is effective in just one use. Used according to the instructions, Full Marks Solution and removal comb will kill head lice and eliminate eggs. Unlike traditional head lice treatments which poison the lice, Full Marks Solution has a physical action on the lice causing them to dehydrate and die. They can then be removed along with any eggs using the Full Marks Removal Comb supplied. Clinically proven to kill head lice and eliminate eggs. No traditional pesticides are used. A comb is included. Suitable for women and children. Product contains solution treatment and comb. 2 treatments are provided.