This mattress is a joke!  Deflated while sleeping on it first nite.  Does not hold air.  Have to inflate every nite.  Big lump in center of mattress.  Not worth the money.  Brought similar mattress before...lasted over a year before losing air.  This one loses air first nite and every nite after.  Not worth my hard earned money.  Thank goodness there is a 90-day guarantee!  Sending back as soon as possible!