Updated November 2026
What is Far Infrared Rays technology?
The performance technology in the Spartan mattress is Nanobionic® technology: a high-tech, patented coating on the mattress cover that transforms your body heat into Far Infrared Rays. Those rays are reflected back to you as invisible waves of energy. Far Infrared Rays are unique in their ability to penetrate, soothe and stimulate the human body, helping you feel more energized and more well rested when you wake.
Far Infrared Rays technology is used in a number of industries, with applications including:
- Performance wear
- Apparel
- Footwear
- Mattresses
- Bedding
- Sleep accessories
- Furniture textiles
- Veterinary products
What are the benefits of sleeping on a mattress with Far Infrared Rays technology?
Referred to as both "active recovery" and "smart fabric," the Spartan performance cover uses Nanobionic® Far Infrared Rays technology to harness and recycle the body's natural energy throughout the sleep cycle. In healthy individuals, the technology is designed to help:
- Temporarily promote increased blood flow at the site of application
- Support faster recovery
- Promote restful sleep
Together, these benefits can help increase general well-being.
Does Far Infrared Rays performance technology really work?
It is based on a fundamental principle: heat is energy. Energy is transferred every day by one of three means: conduction, convection and radiation. In this case, a thermo-reactive process converts your body heat into Far Infrared Rays, which are recycled back into your body as energy.
Is Far Infrared Rays technology safe?
Products using Far Infrared Rays rely on a natural process that transfers invisible waves of energy back into your body. Far Infrared Rays are natural vasodilators, which is why the technology promotes a temporary increase in local blood flow.
Will it work if my skin is not in direct contact with the fabric?
Yes. The Far Infrared Rays re-emitted by the Spartan's performance cover can penetrate materials up to a total of two inches. That can include any combination of sheets, blankets, mattress protectors or encasements, and sleepwear.
Will the reflection of Far Infrared Rays generate heat?
No. Far Infrared Rays will not increase the temperature of your bed.
What else should I consider when shopping for a mattress with responsive textiles?
Cooling technology
Cooling is critical, and it is based on science: a human's actual skin temperature is about 91 degrees, but the ideal sleep temperature is about 88 degrees. Look for advanced cooling technology that, at minimum, creates a temperature neutral environment.
The Spartan goes beyond maintenance to temperature moderation. It is infused with a phase change molecule called TitanCool™ on the surface to help moderate your temperature toward that 88 degree target. Cooling gel beads liquefy at higher temperatures to deliver cooling relief, then solidify at lower temperatures to keep the sleep environment steady. An added infusion of copper helps you sleep cooler and creates an antimicrobial sleep surface.
Personalization vs. one-size-fits-all
Some manufacturers take a one-size-fits-all approach, usually a universal medium firmness. The Spartan comes in three firmness levels, so you can tailor the sleep surface to your needs.
All-foam vs. hybrid construction
The Spartan pairs foam with individually encased coils. Because each coil responds independently to the contours of your body, you get targeted pressure point relief and less motion transfer between sleep partners. Individually encased coils are also more durable and allow more airflow, which supports a cooler night's sleep.
Contouring comfort vs. responsiveness
Foam layers generally offer conforming support that reduces pressure on areas like the shoulders and hips, which can be sources of morning aches. There are many types of foam, and the right one for you shapes your overall sleep experience:
- Memory foam is slow response. It may take a few seconds to return to its shape after pressure is released. Some sleepers love the sink-in feel, while others dislike the "quicksand" sensation.
- Latex foam is fast response. It returns to shape immediately after weight is removed. Some sleepers prefer the buoyancy and deep compression support, while others want less bounce.
- Latex alternative foam, like the TitanFlex™ foam in the Spartan, bridges the gap between memory foam and latex. It responds immediately each time you move, with a balance of contouring and conformability.
While every sleeper is different, many find that a mix of responsiveness and contouring works best.
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