What to avoid when buying a mattress?

When buying a mattress, avoid vague warranties, untested comfort claims, and brands that inflate specifications without independent verification. At least five common pitfalls trip up most buyers before they spend a dollar.

Mattresses are confusing by design: foam layers get renamed every season, "lifetime" warranties often expire the moment you read the fine print, and trial periods come with return conditions that make getting your money back genuinely difficult. The same foam core sometimes ships under a dozen brand names at wildly different prices. Knowing what to sidestep matters as much as knowing what to buy.

Lifetime mattress warranties typically contain pro-rated clauses that reduce coverage to near zero after year 10.
CertiPUR-US certification covers foam chemical safety only, not durability, firmness accuracy, or support claims.
Most sleep-trial return policies require the mattress to be used 30 or more nights before a return is accepted.
Mattress firmness labels (e.g., "medium") are not standardized across brands, the same label can vary by 2–3 ILD points.
Edge support and motion isolation are rarely tested in Amazon listings and account for a high share of verified-purchase complaints.