Dangerous Fumes The production of this mattress, and materials used, produces dangerous fumes that are being constantly released when it is new in your home and lasts thereafter for many month. You sweat at night as your body tries to get rid of the toxins. It is really comfortable and you can sleep for hours but even after airing it for days as soon as it gets heated with the warmth of your body the smells start coming through again. My mattress has two protectors and one old duvet and sheet on top of it. I then lie on top of the sheet but you can still smell the scent of the mattress on the sheets in the morning and the underside of the pillow smells too. its tempting to keep sleeping on it but it cant be safe, not in the long term.