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About product and suppliers:
        Alibaba.com offers 318 40 density foam mattress products. About 74% of these are mattresses, 1% are plastic sheets, and 1% are beds. 

A wide variety of 40 density foam mattress options are available to you, such as free samples, paid samples. 

There are 321 40 density foam mattress suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Turkey, and Romania, which supply 99%, 1%, and 1% of 40 density foam mattress respectively. 

0 density foam mattress products are most popular in North America, Western Europe, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 176 with ISO9001, 98 with ISO14001, and 19 with OHSAS18001 certification.