"Brothers" is a mid-tempo ballad describing the relationship between the narrator and his brother, who is about to go to war. In the first verse, the narrator is reluctant to let his brother leave, offering to do anything that will keep him home. The narrator's brother reassures him by saying "This is what brothers are for". In the second verse, the narrator says that out of all his heroes, his brother is his main. The two of them interact through letters in the second verse, with the narrator telling his brother how much he misses him. Finally, in the third verse, the narrator's brother comes back home, but uses a wheelchair after being injured in the war. As they hug, the brother apologizes to the narrator for having to be pushed home, but the narrator simply replies, "This is what brothers are for."
Roughstock critic Matt Bjorke described the song as "a well-written story song by any measure", adding that it was "heartening to see such a song score with radio." He added that his original review, written in October 2008, was negative in nature because at the time, he did not understand the song's context.