Your back is an important body part and you need to avoid anything that hurts it or affects its shape. Since sleep is inevitable, make sure you sleep on a mattress that doesn’t hurt your back in any way. Many mattresses that claim to be too comfy or spongy often hurt your back in the most unimaginable way possible. Never go for such mattresses. Always prefer a good spring mattress that offers proper back support and feels comfortable.
Other factors to check include its firmness, anti-bacterial and anti-fungal property, and warranty. If you keep these points in mind and buy a mattress, you will never have to worry about your back health.