OsoCozy Gauze Diaper Doubles 100% Unbleached Cotton Pack of 12=(1 dozen) 6 Layer Diaper Liners. Booster pads provide extra absorbency when needed during naps or nighttime rest. Add the number of inserts you need. Each Doubler is 4 X 14 inches and made of six layers of soft absorbent 100% cotton gauze.