Not sure what diaper brand it was because I could only see the waistband of the diaper and I could see a diaper bulge in the kids pants.
When a kid is wearing a diaper under their pants especially sweat pants and the diaper gets full and starts to sag you can see an outline of the diaper and can tell it's clearly a diaper and not underwear the kid is wearing.
The kid I saw one time was last year at the county fair and he was around 6 or 7 years old and he was wearing sweat pants and I could clearly see the outline of the diaper in his sweat pants as I was standing in line at a food concession stand behind him.
He said he had to pee but his mom just said to him Just go in your diaper instead as we can't leave this food line.
He was somewhat embarrassed by what his mom said but if you look hard enough you could tell he was wearing an already wet diaper that needed changed soon.
I like to dress like this boy in the picture below and play outside and inside the house wearing just the diaper, shirt and socks.
More pictures of this cute diaper boy at the link below.
https://www.imgvek.com/album/79f889529f8895c1d29763f79c67b0d9/Diaper_Boy_Tommy
It feels great and is a great outfit.