There is a nice picture there, hopefully someone will post it.
The ad product text says:
SAFE, EFFECTIVE, AND CHEMICAL FREE – Created with you and your kids in mind. This all-natural, essential-oil-infused sticker patch sticks to your little one’s pajamas to help them fall asleep faster and support longer, more refreshing sleep without groggy mornings. SleepyPatches use a specially crafted formulation of essential oils to bring on sleep. No chemicals or other worrisome ingredients!