The Perfect Bite Relief Bundle. Great Value, would cost you over GBP 8.00 if bought separately. Zap-It! is a revolutionary, pocket sized device that is really effective at stopping the itching and swelling caused by mosquito bites and virtually all other biting insects, as well as jellyfish stings adn stinging nettles. The soothing patches in the bundle are ideal for relief from mosquito and insect bites and will offer instant relief. The patches are clear and invisible when applied and perfect to cover those nasty bites.