Abstract: A sheathing device is disclosed for covering and securing the entire length of the adjustable straps of a traditional cap. In this disclosure, a traditional cap has a front, back, top, bottom, at least one strap, and an engagement mechanism for releasibly engaging the strap at alternate points to adjust the size of the cap. The back has an opening at the bottom such that the bottom is parted to define two sides. The strap is attached to one side of the cap proximate to the opening. In one embodiment, the article comprises a sheathing. The sheathing has an inside region of adequate size to envelop the strap. Additionally, the sheathing's length is adjustable, allowing a user to customize its length such that it spans from one side to the other side to substantially conceal the strap when the opening is adjusted for the user's head. For example, the sheathing may comprises severable material allowing the user to cut the sheathing to the customized length.