Ideal for Freshening and Cleansing. Compare to Thieves Oil. Solutions Nature's Shield is a contemporary version of the famed Four Thieves Vinegar that's been used in various forms for centuries. Made with Clove Bud, Lemon, Cinnamon Bark, Eucalyptus and Rosemary oils, Nature's Shield is blended for aromatherapeutic use but can be used for a variety of other purposes.