Pure essential oil works essential oils are 100 percent pure, natural, paraben-free and therapeutic grade. Guaranteed highest quality, all oils manufactured according to gmp and iso9002 standards. Free of pesticides, fillers, bases, contaminants and artificial ingredients. No animal testing. Pure essential oil works sleep blend features an earthy and woodsy aroma with a touch of lemon and sweetness to help calm the brain and body to help you fall asleep and stay asleep. Contains vetiver, frankincense and lavender.