Bed manufacturer Sealy UK & Ireland explains the thinking beneath its support systems

Sealy’s first unique coil design was created in 1936, and the company has been refining it ever since. As materials science, biomechanics and manufacturing technology have advanced, the spring has evolved alongside them.

“As technology and knowledge develop, we constantly update and improve our coil design and performance,” Sealy explains.

Engineering at the Core

Sealy springs are proprietary — designed, engineered and specified entirely in-house. Every detail matters: geometry, response, durability, long-term comfort and the raw materials themselves. Dedicated specialists work solely on development, testing and refinement.

“The spring is our core focus — it’s at the heart of everything we do. Designed and developed by our engineers, it performs like no other. Each spring is twice-tempered for durability, delivering dependable support year after year.”

Durability is a major emphasis. Rather than simply focusing on initial comfort, Sealy engineers its coils to maintain performance over time, minimising settlement and fatigue.


Guided by Medical Research

Product development isn’t based on feel alone. Sealy works alongside its Orthopaedic Advisory Board — a panel of orthopaedic surgeons, biomechanical engineers and medical scientists who contribute clinical research and testing insight.

According to Sealy, this relationship directly influences how mattresses are engineered, evaluated and manufactured.


Consistency Across the Globe

Sealy operates 19 manufacturing facilities worldwide, all following the same production methods and standards. The UK site mirrors procedures used internationally, with specialist machinery designed by the company’s advanced R&D centre in Australia.

In practice, that means a mattress produced in Cumbria follows the same engineering principles as one produced anywhere else in the Sealy network — ensuring consistent performance.


The Different Spring Systems

RestSupport® — Three-Stage Response

At the top of Sealy’s range sits RestSupport®, a multi-phase coil system designed to adapt progressively to the sleeper.

  • A Synerflex surface layer engages with body contours for pressure relief

  • The core of the coil responds to provide alignment and reduce strain

  • Titanium reinforcement increases long-term durability

The aim is balanced comfort and skeletal support in a single movement rather than a single firmness level.


AlignSupport® — Two-Stage Support

AlignSupport® works in two phases:

  • Initial contact senses individual body shape

  • A secondary response maintains neutral spinal posture

The design focuses on alignment — particularly important for sleepers who shift positions during the night.


PostureTech — Targeted Deep Support

PostureTech responds proportionally to body weight, increasing support as pressure increases. Key pressure areas receive greater reinforcement as the body settles into the mattress.

“Our springs are designed to respond to body weight, offering deep-down support where it’s needed most.”


Continuous Development

From historical coil design to modern medical research and global manufacturing standards, Sealy’s spring systems have been shaped by decades of technical iteration. The company continues to refine materials, geometry and performance characteristics as sleep science evolves.

The goal remains straightforward: create springs that don’t just feel comfortable in the showroom, but continue performing night after night.

And if history is any indication, further development won’t be far behind.