Inserts are what you insert in the diaper to soak the pee up otherwise there is nothing in the diaper for the baby's pee to soak up and baby will be all wet. Check on ebay for pictures of any inserts by typing Cloth diaper inserts!
I used Norwex Soap and soaked the diaper in hot water over night with the inserts. The diapers came clean and inserts did not. But they were soaked and washed good!