10 Year Warranty

The "Saint Thomas" is one of Spring Air's best sellers in the "Back Supporter" line. It's moderately priced and is a great value - considering the luxury features that it offers to you and/or your partner. 

Its Dual Performance Edge Design is one of the best at eliminating motion transfer (example: when someone gets in or out of the bed) and its 800 count  Activ-Coil system offers a body-contouring, pressure-relieving sleep surface. 

The Euro Top (attached pillow top design) includes a layer of visco-elastic memory foam and adds even more overall comfort to your sleep experience. The wool/silk/cashmere cover is anti-microbial and therefore, is a solid choice for those who suffer from allergies

This is a great model for people who sleep in any position but definitely offers a better rest for side-sleepers than many other mattresses do. A very respected name, great technology, and quality craftsmanship come together to create one of our best offerings of a medium-plush mattress, at a relatively low price. 

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Saint Thomas - Medium Plush Back Supporter

$1,348 for 58 x 82 mattress

Optional Boxspring Foundation:

Other Custom Accessories

All sheet sets are hand-made of luxurious material and include the fitted sheet, flat sheet and 1-2 pillowcases. They come in a variety of solid colors, most of which are pictured here. We will call you after your order is placed to discuss what colors are available for you at this time.
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Mattress Scale
medium mattress
Approx. Height of Set: 24" (Matt 15" Base 9")

This Mattress Features:
pocket coil mattress Individual Pocket Coil Springs offer much better motion isolation than traditional springs and will also better flex to your body shape.


Anti-Microbial Fibers in Cover (Wool, Silk, Cashmere)
Two Layers of ComfortFlex Foam (Softness)
4lb. Memory Foam in EuroTop (Zoned to Relieve Pressure Points)

Mattress(Top Side)
ComfortFlex Foam Layer
Sleep Shield (Durability)

Activ-Coil 800 Count (Queen) Individually-Wrapped Pocket Coil System
Dual Performance Edge Design (Foam Encased Edge)
Base Foam Layer 


10 Total Years (10 full)

Saint Thomas - Medium Plush Back Supporter

Anti-Microbial Fibers in Cover (Wool, Silk, Cashmere)
Two Layers of ComfortFlex Foam (Softness)
4lb. Memory Foam in EuroTop (Zoned to Relieve Pressure Points)

Mattress(Top Side)
ComfortFlex Foam Layer
Sleep Shield (Durability)

Activ-Coil 800 Count (Queen) Individually-Wrapped Pocket Coil System
Dual Performance Edge Design (Foam Encased Edge)
Base Foam Layer 

Optional Renewable Wood Foundation


Saint Thomas - Medium Plush Back Supporter Reviews
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  • Shipping or delivery of this item to most areas within the 48 contiguous states only. We cannot offer delivery of this item to Alaska, Hawaii, US Territories or APO/FPO addresses without added charges. Please call customer service for rates and availability.
  • Free LTL freight delivery to most cities in the continental US. Destination must be accessible by large truck. Some locations may have a small surcharge.
  • LTL freight service is curbside only. White Glove is available for an extra fee.
  • For complete details, read our Shipping and Return policies.



Measure all 4 sides of your mattress and bed frame before ordering.
We recommend you order the mattress 1 inch smaller than the space it is meant to fill. This will leave extra room for sheets, blankets, and variations in production size. Some people like a larger gap to really have room for your hands to reach down and change sheets easily. Please note that production size is not guaranteed to be exact. Most models are built within ±0.5 inches but the difference can be larger, especially on innerspring models. Custom mattresses are hand made by a factory worker who will take a standard mattress, then shorten it to your size. With the way spring coils are shaped, they will not work when cut in half, so an entire row of springs must be removed to modify mattress sizes. As each row is removed, the bed size changes by 1-2 inches, so your bed may not come exactly the size you order.

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Common Questions

What if it doesn't fit?
We will never ship out a mattress that exceeds the size you have ordered without contacting you first to check if the extra size will cause an issue. Since these are custom made for you they can not be returned, so please be careful when taking measurements. On some bed sets, the box spring will be a different size than the mattress so you will need to measure both pieces. Also, since beds are often set up not perfectly square, you will need to measure all four sides of the bed to find the correct size. Be sure to check for boards or bolts that might protrude in to the mattress area and order your pieces small enough to fit inside of these protrusions.
What sizes are available?
Any size is available upon request but with most models you are limited to being smaller than a King mattress. If you need an odd size bigger than a King, here are some models that can be supersized. Please call us to find out what prices would be.
Can I really order any size and shape?
At this time, we only distribute 4-sided rectangular mattresses with no special notches cut from the corners. The size can be as large as a king, so up to 76" wide and up to 84" long. If you need an odd size bigger than a king, please call us to find out what models are available. You can also order a custom mattress small enough to fit in a baby's crib. Mattresses are formed by rows of metal springs and since springs cannot work if cut in half, your mattress core will be sized in 1-2 inch increments. This means that if you order 47x63 it will be built between 46x62 to 48x64 but most of the time it will come within 0.5 inches of the requested size. Please let us know how precise your size must be.
What about the box spring?
It is very important to measure the size of your box separate from your mattress because in many older bed sets, the box was made slightly smaller than the mattress. The length and width of solid foundation box springs can be custom made to fit exact dimensions. The thickness can not be customized but boxes are available in several standard thicknesses ranging from 4.5-9 inches.
How soon will my mattress arrive?
Once your order is paid for, a specialist from Michigan Discount Mattress will call you on the phone to verify your sizes and delivery information. Production will begin and usually takes 3-6 days with some going faster and others taking a few days longer. After production, the mattress will then be packaged at the warehouse within 48 hours to protect it during shipping to your home. Shipping takes 2-8 days depending on the destination city. Deliveries to the eastern USA are usually faster but packages will sometimes make it all the way to the Pacific coast in only a few days. The combination of producing, packing and delivering means that you should receive your mattress within 1-3 weeks of the day you order. Our streamlined process has successfully delivered 90% of our orders within 3 weeks.