This is the $40 Pokémon Snorlax Plush Reversible Robe available from ThinkGeek and Gamestop. It comes in three sizes (S/M, L/XL, 2X/3X) and one side makes you look like a Snorlax, and the other has a repeating Snorlax sleeping pattern. Both sides have Snorlax's ears on the hood though, so that's something. Granted not something I'd write home about, but-- "Why write home when you can just sit at the table and tell your mom while she's cooking dinner." You don't know me.
Keep going for a handful more shots.
Thanks to hairless, who agrees there's nothing wrong with answering the door for pizza delivery in a robe as long as it's well-tied and your penis doesn't hang below your knees like mine does (I have to wear pajama pants).