Crystal deoderant stone, made of salt and not much else. Works wonderfully, and very little packaging (though you can purchase it in a plastic coventional-looking dispenser.) In highschool I was on the verge of getting Rx antiperspirant because I sweat so bad and it left stains on my clothes-- it wasn't my body doing it, it was the freaking Secret brand antiperspirant/deoderant. Once I stopped using it and my body detoxed (1 week) no more sweat stains or wet arm-pits. Thank Goodness!!