A  Walking Inflatablea fun, wearable costume typically made of lightweight, durable materials like nylon or polyester. It's designed to make the wearer appear as though they are walking inside a large, inflatable dinosaur. These costumes often come with a small fan that inflates the dinosaur, making it stand up and hold its shape as the wearer walks around.

Here’s how it typically works.

Inflation: The costume is inflated by a battery-powered fan (usually included with the costume) that blows air into the inflatable parts.