I put the nappy bag over 1 shoulder and my head first and then put the sling on over the other shoulder and my head, so the crisscross without digging in as my nappy bag has a padded shoulder strap and my sling sits on the bones of my shoulder rather than the muscles and is not painful. I try to take a single pram if I know i wont be long as Sarah cant be trusted to walk far and i will put Em in the sling. I always have 1 small nappy bag for Sarah and 1 large one for Emma as she will need multiple changes of cloths and bibs and spew rags coz she can spew for australia