Sam is liking his red plaid shirts more and more (and so am I). This one is heavy on the red, with only a little subtle black plaid running through it. It does up with buttons, has two breast pockets, and is NOT a western style cut, though that’s usually Sam’s go to. The breast pockets have centre seams.
In Hell’s Angel (11x18), Sam wears this shirt for the entire episode.
In Family Feud (12x13), Sam wears this shirt when they go pick up Gavin from the bus depot. He keeps it on until after they send Gavin back in time.
In The Memory Remains (12x18), Sam wears this shirt in the diner after he and Dean visit the plant when Darrin goes missing midway through the episode. He continues to wear it until the end of the episode.