A flat nappy that already has the layers built-in. Such as 4 layers on the sides and 6 layers down the middle. These would be referred to as 4x6x4. Generally, these nappies get folded into thirds and laid inside a waterproof wrap. They are very versatile as they can be used as the absorbent material inside a pocket nappy, or as a additional booster inside a fitted nappy. They also come in various sizes from prem to toddler, to provide a better fit inside different size covers.

Three panelled flat flannelette nappy that is pre folded and stitched so that the centre panel is thicker than the outer two panels.

Rectangular shaped nappy with several layers of padding in the centre for extra absorbancy.

a diaper service type diaper