Buying this mattress topper was due to having a bad back (years of nursing wear) to give my new extra firm mattress some relief on my pressure points. To my suprise, this topper is very frail when unpackaged so you have to unravel with care cause it tears easily, but no odor ( a plus). The king fits exactly on the king mattress and makes the bed alot taller -2 inches! To my suprise this topper conforms to the mattress firmness but is soft enough on the pressure areas that I noticed I dont even get out of the same position for 6 hrs of sleep! Now that is a wonderful purchase for anyone considering buying a topper for their beds to alleviate some pressure but cannot afford to get a soft plushy bed because of their backs. My mattress and this topper have been an excellent match for me!