Demon slayer is 1 ounce bottle made with natural herbs for protection and exorcism of any actual parasites. Evil malicious entities and demons. This comes in either a spray bottle with an attachment if you would like to use it as a roll-on it is great for all skin types. Can use to spray the home or roll onto the back of your neck for protection. This is not 100% full proof meaning if you were summoning demons or malicious entities on your own, this may or may not protect you this is a protection to keep things unwanted from attaching to you !