Sweet Oud attar is a type of perfume oil that is made from natural ingredients such as agarwood, sandalwood, and other floral and herbal extracts. It is popular in many parts of the Middle East and South Asia, and is known for its sweet, woody aroma. It is important to note that attars are highly concentrated and should be used sparingly. They should also be stored in a cool, dry place away from direct sunlight to preserve their scent and quality.