Abstract: The present invention comprises systems and methods of convertibly covering a bundle of bedding materials. The present invention's approach to covering a bedding material bundle maintains the bedding material bundle in a compacted state when the convertible cover is in an enveloping configuration. When the convertible cover is in a fillable disposition at least one of it's fillable integral compartments is available for providing multiple functionalities including being outspread and inflated to serve as a pillow, serving as a storage or transport container by being filled with a liquid, being configured with multiple fillable integral compartments separated by filters to serve as water purifier, and additional functions. The manner of converting involves at least partially closing at least one longitudinal seem to convert from the fillable disposition to the enveloping disposition, and at least partially opening at least one of the longitudinal seams to perform the opposite conversion.