Picture illustrates overnight doubler with insert on top, which is sold separately.
The Best Bottom Overnight Insert is a super easy way to add absorbency for dry overnights! The Microfiber Overnight Doubler consists of 6 layers of super thirsty microfiber made to fit with any regular insert option of the same size. The Hemp/Organic Cotton Overnight Insert consists of 8 layers of Hemp/Certified Organic Cotton. Just snap the overnight insert into cover and then snap regular insert of your choice on top.
Note: This must be used with a Best Bottom insert over top, as the microfiber and/or exposed snaps can cause skin irritation if used right against baby's bum.