An interface is provided for the comfortable and secure positioning of a hat on the head of an animal such as a dog. The device features a body having a bottom section adapted to engage the head of the animal and an exterior fastened or engageable with the interior of a hat. Recesses in the body align with openings in the hat to provide a pathway for the ears of the animal therethrough. The body provides the hat with a rigid structure to maintain its shape on the animal's head. A strap is engageable around the neck of the animal and to the body or hat on opposing sides, to hold the body engaged with the hat on the head of the animal in an as-used position.
