How to determine whether the mattress is soft or hard?

The simplest measurement method is: lie flat on the mattress, put your hands into the neck, waist and buttocks to see if there is a gap, then turn it over and try to see if there is a gap between the concave part of the body curve and the mattress in the same way. If there is no gap, it proves that this mattress is very consistent with the natural curves of neck, back, waist, buttocks and legs when people sleep, and this mattress can be used. Well-known brands such as Lace, Medellin, Sheraton, etc. all meet the standards of mattress selection for five-and six-star hotels, and bring comfortable sleep experience while fitting the body curve.