Bought this  Extra Firm Mattress from beautyrest and was really happy with my purchase . This mattress offers exceptional support and comfort for people like us with neck/back pain issues looking for firmer sleep surfaces. One of the features that we love is its Pocketed Coil Technology that provides individualized support and minimizes motion transfer. 
The mattress has a firm feel, but it is not too hard that it will cause discomfort. It has a plush top layer made of high-density memory foam that conforms to your body's curves, providing pressure relief to joints and muscles. This layer with its anti microbial property  is also designed to keep you cool by dissipating heat away from your body, ensuring a comfortable sleep all night long and temperature preferences.

Overall it's an excellent investment and choice as the mattress is made of high-quality materials that are built to last long .