the 'new' long mattress is concave like a 'U' as in 'used.' and soft. regardless of whether it is used, i need a taut , flat mattress to sleep safely with less chance of choking on my thick saliva. easy to dismiss, this is reality. the bed is now a deathtrap. bring back my former mattress or a new one -- not another softy grabbed from the storeroom. or sell us a brand new one. very, very soon. today. i don't need to pay for danger, and i need to sleep in a bed, not this wheelchair. respond and fulfill ASAP, or i'll begin spreading the word about your company to the crip ccommunity.