Johnson's relaunched 400ml aerosol kills fleas, larvae and other insect pests on carpets, rugs, soft furnishings, pet bedding, etc. It also contains a powerful long acting Insect Growth Regular (IGR) to prevent hatching eggs developing into fleas and give continuous protection in the home for up to 6 months. Regular use of a House Flea Spray is also necessary to deal with 95% of the flea life cycle, which takes place in furnishings etc. where hundreds of flea eggs, larvae and pupae develop rapidly into adult fleas and cause continual re-infestation of pets and homes.