Used from newborn to around 1.5 months old. My baby slept well when wearing it, and nighttime crying was reduced. There is a feeling of use. There are some pills, but it can still be used. I am selling it because my baby has outgrown it. It has been washed. It will be folded compactly for shipping, so there may be some wrinkles. Please consider only if you understand that this is a used item.