What is ellie last of us backpack?

Sorry, as an AI language model, I do not have the ability to browse or retrieve information about inventory or product details in the market. However, in the video game "The Last of Us", Ellie's backpack is a significant item that plays a role in the game's narrative. It carries essential items such as health kits, weapons, ammunition, and crafting materials that Ellie uses throughout the game. The backpack's design is inspired by retro hiking backpacks, which reflects Ellie's former life as an orphan born into a post-apocalyptic world.