"Very Firm What is a good mattress?It must be firm enough to support the body and soft enough to fit its shape. The criterion that allows you to find out quickly what firmness is right for you is: the morphology, the bigger the body the more it is important for the mattress to be firm. To choose your bedding, take the time to try it in the posture in which you sleep and in several positions, sitting, lying down, on the side, on the stomach, etc. The very firm mattress is suitable for people who sleep on their back and for morphologies from 1. 60 m/80 kg, and over 100 kg regardless of height. "