... relieve fatigue, 4.promote sleeping. Why choose DKY mattress ?Do you know the biggest advantage of a ... chooes the high quality jade,real natural xiuyan jade ,instead of bad dandong jade.Smoothy surface needless to ... no matter it is simple,such as all jade or tourmaline,or some others like carnelian , ... Even some other creativity pictures,or just a heating pad without anything,no problem,we also could ...