Most mattress manufacturers don't advertise expected lifespan because the honest answer doesn't sell cheap mattresses. Here's what the materials actually deliver.

7-10 yrs

Memory Foam

Memory foam compresses permanently under body weight over time. The foam's cell structure breaks down, and the mattress loses its original firmness and support. Most memory foam mattresses show significant sagging by year 7-8 and need replacing by year 10. "Luxury" memory foam fares somewhat better but follows the same trajectory.

7-12 yrs

Innerspring & Hybrid

Coil innerspring mattresses depend on coil gauge, count, and the quality of the foam layers on top. The coils themselves can last longer, but the comfort layers above them compress and sag first. Hybrids (coil plus foam layers) inherit this problem. Expect 8-12 years from a quality hybrid before the comfort layers fail.

25+ yrs

Natural Latex

Natural latex doesn't compress permanently. Its resilience comes from the cellular structure of vulcanized rubber, which returns to its original shape after pressure is released. A natural latex mattress bought today will have essentially the same ILD (firmness measure) in 25 years. This is not a marketing claim. It's a material property.

What causes mattresses to break down

For synthetic foam, the mechanism is cell collapse. Foam is made of air pockets. Under repeated compression, those pockets collapse and don't fully reinflate. This is permanent. The process accelerates with heat (which memory foam specifically generates), body weight, and time.

For innerspring mattresses, coil fatigue and comfort layer compression are the usual culprits. The coils can last decades, but the materials layered on top fail first.

Natural latex doesn't have the cell-collapse problem. It's vulcanized rubber, which has a different mechanical response to compression. It deforms under load and returns to its original shape. 25 years of nightly use doesn't change that.

The cost-per-year math

A quality memory foam mattress costs $1,200 to $2,000 CAD and lasts 8-10 years. A comparable natural latex mattress costs $1,800 to $3,500 and lasts 25+ years. Over 25 years:

Memory foam (replaced 2-3 times)
$3,600 to $6,000
$144 to $240 per year
Natural latex (one purchase)
$1,800 to $3,500
$72 to $140 per year

Natural latex costs less per year of use in most comparisons, and performs consistently throughout that time rather than degrading as the years pass.

Signs your mattress needs replacing

The clearest indicators, in order of reliability:

  • Visible sagging or body impressions. If you can see where you sleep in the mattress surface, the foam has permanently compressed. Anything deeper than about an inch is meaningful.
  • You sleep better elsewhere. If you wake up feeling better after a night in a hotel or on a couch than you do in your own bed, your mattress is causing the problem.
  • Morning soreness that improves through the day. Soreness that diminishes as you move around points to sleep posture, which points to mattress support.
  • Noise. Coil mattresses creak when the springs fatigue. A mattress that makes noise under movement has worn coils.
  • Age. If it's over 10 years old and synthetic foam, assume the support is compromised even if you can't easily see it.

How to extend mattress life

For any mattress: use a quality mattress protector. Moisture accelerates foam breakdown. Rotate the mattress 180 degrees every six months to distribute wear. If it's flippable, flip it too.

For natural latex specifically, these steps matter less because the material is more resistant to the things that kill foam. But a protector is still worthwhile to protect the ticking and keep the mattress clean.