Simmons, Shu Da, USA. Shu Da has production in the mainland, manufacturers in Shenzhen, and many chain stores around the world. There is Shu Da in Changsha, Zhuzhou and Xiangtan. Shuda is cheaper than those two. I think Shu Da mattress is a very good brand in Chinese mainland. A brand worthy of consumers' trust.

Generally, the price of 180X200X 18 is between 3000 and 4000, which should be the best price of latex produced in China.

Anything above 5000- 1000 is profiteering, and the price is too low to be authentic.