10 Year Warranty

The Symbol Mattress "Dortmund Double-Sided Luxury Firm" is a fantastic choice for anyone who is in the market for a firmer mattress - that still has body-contouring effects - that is cost-efficient. Sometimes with pocket coil mattresses durability can be a concern but with the Dortmund this won't be a worry. High density foams and a flippable design combine to give you long-lasting comfort. As an added plus, this model features a white organic cotton cover. 

This model is made in the USA and it's composed of CertiPUR-US foams. Its manufacturer is very dedicated to progressive mattress design; always adding the most current and sensible features to all of its models. New for 2018, the Dortmund looks to be a mattress that ends up being one of our best sellers. This is an improvement on a previous design that was already a great mattress value. 

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Dortmund Luxury Firm - A Double-Sided Mattress

This mattress can only be made in standard sizes. To see prices, please click here

Mattress Scale
semi firm mattress
Approx. Height of Mattress: 13"

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.

CertiPUR-US certified foams are:


✓ Made without ozone depleters
✓ Made without PBDEs, TDCPP or TCEP (”Tris”) flame retardants
✓ Made without mercury, lead, and other heavy metals
✓ Made without formaldehyde
✓ Low VOC (Volatile Organic Compound) emissions for indoor air quality (less than 0.5 parts per million)
✓ Made without phthalates regulated by the Consumer Product Safety Commission


White Organic Cotton Cover
Cotton FR Fiber Barrier
1/2" Air Flow Foam
1/2" Comfort Foam

Mattress(Top Side)
1" HIGH DENSITY Convoluted Support Foam
1" HIGH DENSITY Comfort Foam

FOAM ENCASED Enclosed Coil Support System with 840 Coils (Queen Count)

Mattress(Bottom Side)
1" HIGH DENSITY Comfort Foam
1" HIGH DENSITY Convoluted Support Foam

Cover(Bottom Side)
1/2" Comfort Foam
1/2" Air Flow Foam
Cotton FR Fiber Barrier 
White Organic Cotton Cover 

10 Total Years (10 full)

Dortmund Luxury Firm - A Double-Sided Mattress

The "Dortmund Double-Sided Luxury Firm" is a great, cost-efficient double-sided (you can flip it!) mattress by Symbol that is available in both standard and custom sizes. A "luxury firm" is going to be a firm and supportive sleep surface that still conforms to your body while you lie on your side - due to its individually wrapped pocket coil system. 

Air Flow Foam helps to dissipate your body heat as you sleep. Foam encased edges decrease motion transfer and provide stability to the mattress. The specifications that this mattress offers would result in a much higher retail cost, if this model were made by a "bigger name" manufacturer. Well, with the Symbol Dortmund, you're getting all of the great features, comfort, and longevity; with the lower price tag. 

If it's a luxury firm that you're looking for that helps dissipate body heat and is made of high density foams and high quality materials, the Dortmund is a great option. If you like the idea of a double-sided pocket coil mattress with cooling foams but would like a softer feel, have a look at the:Restonic Daley Pillow Top Double-Sided Luxury Mattress 



  • Shipping or delivery of this item to most areas within the 48 contiguous states only. Delivery of this item to Alaska, Hawaii, US Territories or APO/FPO addresses will require 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 to your driveway 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, with only 1 exception (found here), 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. 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. 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.