According to Byrdie, the best toner for sensitive skin is the ZO Skin Health Calming Toner. This toner contains a blend of conditioners that help soothe and hydrate the skin, making it an effective anti-irritant. Another great option is the First Aid Beauty Ultra Repair Wild Oat Hydrating Toner, which is blended with oatmeal, an ultimate skin-soother, to help repair and hydrate even the most reactive, flaky skin.