GroVia Boosters can be used to add more absorbency to your GroVia diapers during nighttime use, or other times that you need it. They are made of 3 layers of thirsty GOTS Certified Organic Cotton, and will boost the absorbency of your diaper without adding bulk. Perfect for naps, nights, or long car rides!How to Use: Simply lay one of our GOTS-certified Organic Cotton Boosters on top of your Soaker Pad, and you are ready to go.2 per pack.