The pillow's firmness should also be considered in terms of the position in which you sleep. But whether you prefer to sleep on your back, side, or stomach, the right pillow should provide you with uninterrupted comfort all night long. One of the most common barriers to restful sleep is overheating during the night. The best bedroom cushions provide good airflow regardless of firmness without changing their shape. Another thing to remember is that lack of ventilation favours the appearance and storage of mites and unpleasant odours.