An absorbent garment including a shell having a front panel and a rear panel, the front panel and the rear panel both having an exterior-facing surface and an interior-facing surface a fastening system coupled to the shell, the fastening system including a waist strap having a first end portion and a second end portion configured such that the first end portion and the second end portion can be overlapped over the rear panel and a buckle strap coupled to the exterior surface of the rear panel and configured to extend over the waist strap and to be attached to the interior surface of the rear panel.