This is hands down my favorite blend from doTerra! I use their OnGuard protective blend in the standard 15mL dropper bottle, the 10mL roller bottle (diluted with fractionated coconut oil for topical use), the foaming hand soap, and the hand sanitizer spray (I carry this in my purse at all times). The undiluted oil is perfect for diffusing daily and is a blend of wild orange, clove, cinnamon, eucalyptus, and rosemary so it smells amazing. I use the roller ball version on the bottom of my feet before I go to bed every night and sometimes on my neck if I feel a cold coming on. It absorbs quickly and doesn't leave any residue behind. The foaming hand soap is a must have for me all year, especially during cold and flu season. It is a great natural option to stay healthy and boost your immune system if you feel like you are coming down with something! It is somewhat expensive but in the long run, it's more cost effective than going to the doctor! Personally, I purchase doTerra oils at the wholesale price from a friend who sells for them to help save on costs.