1: Lying on the mattress without pillows, feet straighten up and take turns less than 45 degrees, alternating about 10 times. See if it feels laborious. You can also observe whether the mattress is too strong when lying down.
2: Turn around left and right to check whether it is laborious.
3: Lying on the side, you can use a pillow to detect whether the back spine is arranged in a straight line.
4: Pillows need to be selected according to your mattress. The double bed does not necessarily need to be equipped with the same pillow. If it is a pillow on the back, please note that we often say the height of a punch is the height of a fist behind our neck.
In this way, you will have a beautiful carrier to carry your sleep!