Useful information

Why Do You Wake Up "Not Awake"? What Is Sleep Inertia and How Your Mattress May Be to Blame

24/07/2025 | Nooknik

Have you ever awakened with the impression that your head was still asleep?

Even after 7-8 uninterrupted hours of sleep, you're still fatigued, lethargic, and confused as to whether you even slept at all

If that sounds familiar, you could be experiencing something known as Sleep Inertia.

And looky-loo your mattress could be one of the biggest baddies.

What is Sleep Inertia?

Sleep Inertia refers to the drowsiness, mental fogginess, and reduced alertness that you feel in the first 15 to 60 minutes after waking up.

It happens because your brain is still sleeping from deep sleep, especially if your sleep patterns were interrupted.

What Does Your Mattress Have to Do With It?

Most individuals concentrate on the number of hours they sleep but sleep quality is equally important. And your mattress has a lot to do with the quality.

If your mattress does not support your body correctly:

  • It creates back pain, neck tension, and improper posture while sleeping
  • Leads to constant tossing and turning, which breaks up deep sleep
  • You can easily wake up in the middle of the night, hindering complete sleep cycles

If your mattress is sagging, too soft, or too firm:

  • Your body won't be able to enter or stay in deep sleep
  • Your brain won't receive the recovery it needs, causing Sleep Inertia

If your mattress retains heat or has poor air flow:

  • Sleeping hot or damp can lead to discomfort and nighttime wakefulness
  • An incorrect sleep temperature has a direct impact on your sleep quality

How to Choose a Mattress That Helps Reduce Sleep Inertia

  • Choose one that will fit your spinal alignment

Specifically for your preferred sleeping position back, side, or stomach.

  • Choose the right firmness for your body type

Not too hard. Nor too soft. Just the right amount to support your weight and shape.

  • Good air flow and breathability

A mattress that prevents heat buildup translates to cooler, more comfortable sleep. Omazz RightMattress features Talatech™ Latex with Opened-Cell Structure, a ventilation-inducing latex technology that facilitates air circulation and, thereby, natural dissipation of heat and moisture retained in it.

  • Try Before You Buy

Omazz provides Private Zone Booking, where you can experience up to 2 hours of real rest on the mattress with one-on-one guidance from Omazz sleep experts.

In Summary:

Sleep Inertia is more than "feeling slow in the morning"

It’s often a sign that you’re not sleeping deeply enough and one major reason could be your mattress. You spend one-third of your life on your bed. Investing in a high-quality mattress is not just about comfort, it's an investment in your long-term health and energy for the day ahead.

For those who prefer, you can experience the comfort at Omazz Gallery Thailand or any Omazz Gallery showroom, including:

  • Omazz Flagship Gallery – Ekkamai Soi 4
  • Omazz Gallery - Crystal Design Center (CDC)
  • Omazz Gallery – Mega Bangna
  • Omazz Gallery – Siam Premium Outlets Bangkok
  • Omazz Gallery – Seasons Village Ratchaphruek
  • Omazz Gallery – EMSPHERE

Mattress City branches nationwide

Store locator near you: https://bit.ly/3PLJunW

And at main department stores