This pack contains, the tea tree nasal spray, the bacteria buster spray and the covid-19 synergy. Shelley originally formulated the synergy in NZ's first lockdown in 2020 by comparing the chemotypes of the essential oils against the covid-19 molecule. Feedback in the shop has been great, the formulations work a treat. Packs are always cheaper, as they are slightly discounted when products are grouped together. Instructions supplied.