The help to sleep depends on the shape of the pillow. As long as the shape can support the neck well and make the cervical vertebra in a physiological bending state, it can help sleep.
Latex is actually a luxury, and the price is very expensive. However, due to China's "super imitation ability", most latex pillows on the market at present are not real latex, but derivative products of latex, or have nothing to do with latex at all. Be careful when choosing.