What are the patents of Iris mattress?

Iris has four "patents+certifications", namely, the first-generation central back protection patent, the second-generation central back protection patent, hypoallergenic design and wrapping spring design. When used in a mattress, it can not only provide enough support for the human body, reduce the pressure on the shoulders and buttocks, but also properly support the sunken parts of the human body, such as the waist, and create a safe and comfortable sleeping environment to ensure that the mattress will not be easily deformed after long-term use.