Manufacturer's Description (SleepLogic): 

"When it comes to ultimate luxury, comfort and support, nothing compares with the ChiroSense 800 Series. Experience premium features inside and out, starting with our 800-coil SupportSense® innerspring and the world’s finest latex foam. Patented 800-coil SupportSense® innerspring features five unique zones of comfort created by helical wires that are 25% heavier in key support areas.  Foam encasement prevents edge breakdown; lets you utilize the entire sleep surface.  High-density block foam under spring absorbs energy, helps reduce motion transfer.  Exclusive Neural Net® grid helps keep your spine in a natural position.  High profile ComfortTech™ boxspring provides stability."