The NPC pack will enable the “Attires” function for Arlo, Emily, Phillis, Ginger, Dr.Xu, Gust, Sam, and Mint. To try out these new outfits use the “social” setting in the menu, tick the new outfit and they will wear your shiny new clothes the next day when you wake up. You can also tick both default and the new outfit to make it so they wear a random outfit every day!
The player pack includes 8 new exciting player costumes. Once purchased you can collect your new clothing from the mailbox outside the workshop!
If you collect both packs you'll even be able to match outfits with your partner!
https://store.steampowered.com/app/1075040/My_Time_At_Portia__Player_Attire_Package/
https://store.steampowered.com/app/1075041/My_Time_At_Portia__NPC_Attire_Package/