You can learn about American mattresses in hand-held reclining mattresses. This is a relatively healthy mattress. Its inclined plane allows you to lie on your back, thus correcting the spine, especially the cervical vertebra. At the same time, it is an American mattress that can be disassembled and washed-of course, there are also some that cannot be disassembled and washed. At the same time, this kind of mattress also sends customized pillows, which can be used as a general mattress or a mattress with a pillow. This method of correcting the spine is called Mackenzie therapy, which is a physical method. Please understand.