As typical for items from the employee store, this is new without tags but wrinkled because they jam them into boxes without care. The employees then purchase them from the employee store which is a "sidewalk sale" where the items are either out in the parking lot, or inside. Employees smash into the sale and mosh pit each other fighting for the deals just like the video games.
Rather than iron the shirt and cause any damage, I'll leave it up to you.