A new addition to Sam’s plaid wardrobe, this plaid is a muted, red green, blue, and white. It has no visible breast pockets and does up with dark buttons or snaps.
In Heartache (8x03), we see Sam wearing this shirt during a flashback to his birthday spent with Amelia.
In Devil May Care (9x02), Sam is wearing this shirt when he and Dean arrive at the Bunker with Crowley towards the beginning of the episode. He wears it until he and Dean have to put on suits to investigate the incident on the Navy bus.
In Holy Terror (9x09), Sam wears this shirt at the beginning of the episode when he and Dean are traveling in the Impala.
In Mother’s Little Helper (9x17), Sam wears this shirt at the beginning of the episode when he is in the Bunker.
In The Things We Left Behind (10x09), Sam wears this when watching the Three Stooges with Dean in the Bunker at the beginning of the episode.