Definition: A diaper liner is a piece of fabric or other material that is used on a cloth diaper to protect the diaper from rash cream or other lotion, or to make it easier to quickly remove any solids from the dirty diaper. Diaper liners can help reduce staining since the solid waste sits against the liner instead of the diaper itself.
Some cloth diaper liners are very thin and disposable. Many cloth diaper manufacturers also sell rolls of these diaper liners, too. Disposable liners are made to either be thrown in the trash or flushed down the toilet. Some may also be compostable.
Other reusable diaper liners are made of thin fleece or another type of fabric that can sit atop the cloth diaper to protect from diaper creams. It's often easier to strip diaper cream residue out of a small load of reusable liners than to strip a whole load of cloth diapers.
