Wanted Double memory foam mattress ?

iam looking for a new(still in the wrapper) memory foam mattress for a double bed,must be brand new(not wanting anyones p*** stained seconds)also must be of good quality and not made in some place called yingyangyong,i want to be able to fart and not worry about it bursting into flames.please email me with details and delivery would be helpfull,iam in lennoxtown area