Lavender 40/42 essential oil means that the lavender is blended with other lavenders to bring the percentage of linalol to between 40% and 42%. Linalol is an active component of Lavender that is therapeutically beneficial. Some Lavenders have more than 40/42 but most don’t. Lavender is the most versatile of essential oils. It is relaxing and refreshing, uplifts the spirits, and helps to relieve the distress of muscle pain. No home should be without it. Lavender essential oil balances your body and mind, calming or uplifting according to your body’s needs. Excellent for refreshing tired muscles, feet and head. Add a drop to the pillow/sheet before peaceful sleep. Treats burns and reduces scarring. Can be used neat in small amounts on burns, but care still needs to be taken.