Where can I buy a Onward Mattress and does it have any side effects?

Angshou mattress is not a spine care mattress, it only appeared in recent years and can be used to correct the spine. It is available on Taobao and other e-commerce platforms. Correct use has no side effects, on the contrary, it is a very good product for the cervical lumbar spine. It has a variety of ways to use. Please understand.