Need a safe and quick solution to comfortably join twin beds? The Create A King bed doubling system features an 8.5-inch wide poly sheepskin strip that softly pads the area where the beds meet. Strong 2-inch adjustable side belts snap onto the sheeps kin and buckle together to hold the mattresses safely in place. Fits all twin mattresses 39 inches wide and 75 - 80 inches in length to create a king size bed. Belts may be removed for easy washing and is non-allergenic. Mattresses are not included