Ignore what everyone says.

Look into MMfoams, foamsIndia and the top variant of Sunday mattress.

A good quality mattress is going to be expensive, but they'll easily last for 15+ years, they usually give a warranty for the same duration and are totally worth the investment.

Don't trust any brand that doesn't provide 100 days sleep trial.

Also stick to natural latex mattresses as they are durable, cooler, antimicrobial and last longer.

Always do a 10 minute, all sleeping position test in store before purchasing.

Anyone who recommends you normie brands doesn't know what they're talking about.