05/28/2026
Here’s the science behind why you and your partner can never agree on a mattress 🛏️
Mattress firmness is an objective measurement called IFD ➡️ Indentation Force Deflection.
•IFD measures how many pounds of force it takes to compress foam, higher number = firmer mattress.
•But perception of firmness is 100% subjective, two people can feel completely different things on the exact same mattress.
•Memory foam is a perfect example, it can be technically firm but still feel soft and sinking.
•Your sleep position and body type change everything, a back sleeper and a side sleeper need totally different support.
The right mattress isn’t a number on a label. It’s the one BUILT around how you sleep. Try building one yourself on our site. Link in profile.🌙