Because it's a pan pizza, the crust surrounding the stuffed filling is crispy. Inside it's piped with two different cheeses (looks like mozzarella and cheddar) along with a tangy Garlic Napoli sauce. On top, there's chicken chunks, chicken loaf (like a meat loaf, but made with chicken), caramelized pineapples, and peppers.
The pizza crust is described as crispy on the outside, and fluffy on the inside, and indeed, looks almost as fluffy and thick as a sandwich slice of Wonderbread.
For a better look, you can check out the commercial below. Apparently, the pizza is a "world first" for Pizza Hut.