Precautions for purchasing mattresses

What are the precautions when purchasing a mattress?
Sleep is related to human health, and the quality of a mattress directly affects one's sleep. When choosing a mattress, the following precautions should be taken:
1. Judging the Quality of Mattresses from Product Identification
Authentic mattresses, whether they are brown mattresses, spring cushions, or cotton mattresses, all have product name, registered trademark, manufacturing company name, factory address, contact phone number on the product label, and some even come with a certificate of conformity and a credit card. The vast majority of mattresses sold in the market without a factory name, address, or registered trademark are counterfeit and inferior products with low quality and price.