foundation, see the Frequently. Asked Questions at the end of this manual. ' I assembled the. Sleep Number bed by myself. My wife was in doubt at first, but, after. i8 i10 i8 i10 i8 i10. Assembling your mattress. Carefully check the contents of your mattress boxes. Follow the instructions on your remote to find your favorite. bed. Next, assemble the base, position the mattress and attach the Firmness These instructions refer to 'left' and 'right' as if you are lying on your back on. The ultimate guide to assembling a Sleep Number bed including preparing for delivery, finding your Sleep Number setting, attaching a headboard and more. 2000-2019 Sleep Number Corporation SLEEP NUMBER, SLEEPIQ, SLEEP NUMBER 360, the Double Arrow Design, SELECT COMFORT, and IT are registered .