Sam's Grey Jacket
This smart grey jacket has no breast pockets, but two large lower square pockets that have flaps that do up with a button. The jacket itself does up with a zipper. In S13, we learn that this jacket has a really lovely red plaid lining – because Sam can never be too far away from plaid.
In Twigs & Twine & Tasha Banes
(12x20), Sam wears this jacket to meet up with Alicia and Max. He takes it off briefly when they are hanging out in the B&B with Tasha, but puts it back on again when he goes to pick up the take out, wearing it for the rest of the episode.
In The Big Empty (13x04), Sam arrives at the Bunker wearing this jacket at the beginning of the episode, and then takes it off as he speaks with Dean. He wears it again when he, Dean, and Jack dig up the grave to see if they’re dealing with a zombie, and then again later when they make the connection between the victims and go visit Mia, the therapist that they all have in common. He wears it until they say goodbye to Mia.
In Unfinished Business (13x20), Sam is wearing this jacket when he and Dean get back from disposing of Narfi’s body. We then see him take it off. He wears it again when they are getting ready to go after Loki, and keeps wearing it until that business is finished.