Mattress Description: 1) Customized Color and Size 2) QB/T1952.2- ... idt ISO 9001: 2000 3) Anti-bacteria Green Home: the mattress is designed of hard spring layer and soft spring layer ... foam ,as well as soft glue-spreading sponge. The whole mattress can anti mite and bacteria, is neither too soft nor ... other is harder .You can stretch at will on this mattress and enjoy a relaxed sleep.