Abstract: A flossing device and related method of use to aid in holding and tensioning a flossing material during flossing of teeth. The device is closable as a clam shell or may otherwise enclose a portion of flossing material, such as a spool of flossing material. The device includes a tensioning feature to enable a user to adjust exposed flossing material to a desired tension, as well as re-tensioning that material when it becomes slack. The device includes a floss anchor mechanism to aid in retention of flossing material within the device as well as optionally aiding in tensioning of the flossing material. Exposed flossing material is tensioned by means of a slidable mechanism which may be at least partially exposed.