Medical Mattress

Though thin mattress may be cheaper, they tend to become hard and uncomfortable over time. Thicker mattresses are comfortable; they might be cumbersome to move around. Ideally go for a mattress with medium thickness, the ideal thickness of a mattress for a regular individual is about 4 inches to 5 inches.
Firmness
It's important that the mattress provides proper support to your backbone and keeps your spine in natural S-shape. Coirfit mattress series best suits your spine.
Medically Approved
There are mattresses like Health+ from Coirfit, Healthboom from coirfit which are medically approved. These cost less than other mattresses and will be better for overall health.
Such approvals from organizations like Indian medical association and orthopeditions ensure mattresses fulfill all medical physiological requirements and giving the right posture support while sleeping.