Ambrose Cushion Firm

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What is Sleep iD?

Sleep iD is the result of extensive research between King Koil and the ICA. We have analyzed hundreds of people of all body types with varying sleep habits to learn which mattress construction properly supports different profiles of sleepers.

Launch Sleep iD
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Enjoy a pressure relieving night’s sleep with the King Koil World Luxury Ambrose Cushion Firm mattress. This features an 8,” 858 Contour Elite encased coil system to reduce tossing and turning, a latex lumbar support, and moisture wicking Tencel™ fibers woven into the sleeping surface. 


This King Koil mattress has earned the International Chiropractors Association (ICA) Silver Endorsement by meeting the ICA qualifying standard to help achieve a better night’s sleep.


All King Koil products are proudly designed and built in the USA.


Also available in a firm model.


  • Upholstery:Latex Lumbar Support
  • Coil:Contour Elite Encased Coil System
  • Core:Contour Elite Encased Coil System
  • Edge:Excellent Edge™ Foam Encasement
  • Base:Densified Fiber Pad
  • Foundation:Natural Wood Foundation
  • Warranty:10-Year Non-Prorated

Reduced Motion Disturbance

Enjoy an undisturbed night's sleep with our individually encased coil system. These independently wrapped coils conform to your body's curves while reducing any sense of motion if your partner decides to move or get out of bed.

Expanded Sleeping Surface

Our Excellent Edge™ Foam Encasement provides greater stability, a firm seating edge and larger, more usable sleeping surface.

Proudly Designed and Built in the USA

All King Koil products have been designed in the USA since 1898.

Body Conforming Encased Coils

The Contour Elite Encased Coil System has 858 independently encased coils that are designed to reduce motion disturbance and body pressure points, giving you the ultimate in comfort and support.

Adjustable Base Friendly

Enjoy an even healthier night's sleep with this adjustable base compatible mattress design.

Latex Lumbar Support

Located in the center third of the mattress to provide additional back support and comfort.

Proper Spinal Alignment

King Koil is the only mattress manufacturer that is endorsed by the International Chiropractors Association (ICA) to help promote proper spinal alignment and a healthier night’s sleep.

Tencel™ Fibers

The mattress comfort surface incorporates Eco-friendly Tencel fibers, derived from sustainable wood sources that promote the body’s natural thermal regulating mechanism, deter bacterial growth and enhance breathability by efficiently absorbing moisture. Tencel is durable yet gentle on the skin to provide long-lasting comfort and an optimal skin climate.

Pressure Relieving Support

This King Koil mattresses offers foam and coil technologies that help relieve pressure points to reduce tossing and turning, resulting in a more comfortable and supportive night’s sleep.

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