Built Puff are here! What are Built Puff, you ask? Well, they are a bit of heaven on earth. Marshmallow heaven, that is. The first and only collagen protein bar with amazing marshmallow texture, Built does it again. It has a delicious texture, flavor, and, of course, it is covered in Built’s signature chocolatey shell. You will quickly forget this is a protein bar, thinking of it more as a tasty treat. Feel good about that.