A customizable mask system can include a facemask, such as a filtering facepiece respirator, that has a first set of fastening elements integrated into an internal surface of the facemask. The system can also include a customizable mask band adapted to cover at least a portion of an external surface of the facemask. The mask band can have one or more attachment portions positioned on the mask band in locations that correspond to positions of the first set of fastening elements on the facemask and a second set of fastening elements integrated into the attachment portions. The attachment portions of the mask band can wrap around side edges of the external surface of the facemask such that the second set of fastening elements mate with the first set of fastening elements.