The InvisaPad is designed to work with almost all mattresses, including airflow, foam, spring and extra-thick varieties. It is placed beneath a mattress, so is invisible to a patient. It detects bed presence or absence of a patient without interrupting sleep. Provide patients with the best comfort. On top of that, novel features like the Early-Alert function also come standard with the InvisaPad. You can switch between Standard and Early-Alert modes and adapt to each unique caring condition.