Disclosed is a cap shaping and forming insert device having a U-shaped structure that is placed in the front interior sweatband portion of a billed cap to prevent collapse and deformation thereof. The cap insert comprises a structure having at least two opposing vertically oriented arm members perpendicular to an elongated member disposed thereinbetween. The elongated member remains along the sweatband portion of the cap while the vertical arm members extend upward and into the interior crown of the cap. The cap insert is flexible and yet maintains a user-formed shape that can be used to maintain a desired shape of a billed cap once deployed therein. Moreover, a billed cap can be worn simultaneously with the cap insert therein. The cap insert can be washed and dried using standard methods while the cap insert is disposed therein in order to further preserve the structural integrity of the billed cap.