Eight teenage boys are nude for about a quarter of the movie. The camera records them from almost every angle, but there aren't potentially prurient close-ups.
There is no sexual activity. There is one short conversation that might possibly imply sexual play, but it's very vague.
Violence & Gore
Mild
A group of boys strip a younger boy naked before getting out of their own clothes to go skinny dipping.
The boys drive an abandoned van. They end up running into a shelter that one of the boys built next to a rock. The next day, the boys burn the van.
Profanity
Mild
The S-word is used twice, once with its literal meaning and once as an expletive. One of the boys says he wants to "ball a chick" when they get home.