How it Works: Change over day! When your new refill goes in and you stop yet another deodorant can or plastic container going to landfill or being ocean bound. 1. This is your deodorant refill: you must already have an outer case to put this in. 2. Active, Core or Sensitive: Remember to choose the right strength level for your armpits. Level 1) ACTIVE = our deodorants created for those who suffer with BO and rely heavily on deodorant. Best level if you are transitioning from an anti-perspirant. Level 2) CORE = free from sodium bicarbonate/ baking soda for those who have allergies to it, don’t require such super strength and for younger, teen armpits. Level 3) SENSITIVE = for super sensitive armpits. No baking soda and a gentler base formula to care for delicate skin. 3. Choose your Fragrance: Match your mood or day ahead with our entirely natural fragrances, nothing artificial.