5383 S. Westnedge Ave
Portage, MI 49002
(269) 552-9019


545 N Drake Rd
Kalamazoo, MI 49009
(269) 349-4999

Battle Creek

5285 Beckley Rd
Battle Creek, MI 49015
(269) 979-9799


5383 S. Westnedge Ave
Portage, MI 49002
(269) 552-9019


545 N Drake Rd
Kalamazoo, MI 49009
(269) 349-4999

Battle Creek

5285 Beckley Rd
Battle Creek, MI 49015
(269) 979-9799

Comfort Level

Softer Harder

Sealy Crown Jewel
Black Opal Cushion Firm

In this cushion firm Sealy mattress, you’ll get targeted support for your back and core from the exclusive CoreSupport™ Center, reduced motion transfer from upgraded coils so you feel less movement from your partner throughout the night, and cushioning comfort you can count on from high quality foams.


Starting at: $499.00

Sealy Crown Jewel
Black Opal Cushion Firm


Sealy’s Crown Jewel line of bedding is designed specifically with people in mind who want a good mattress, but might not have a Stearns & Foster in the budget.  Ample layers of upholstery on fabric-encased springs deliver a firm, but definitely not hard feel. Pair this mattress perfectly with anything from platforms to electric adjustable bases.
An absolute winner in the guest bedroom category!


Comfort For Everyone
The Black Opal Cushion Firm in Sealy’s Crown Jewel line offers a quality firm feel at a value that isn’t hard on the pocketbook.  Using a pocketed, or “wrapped,” style innerspring offering excellent motion deadening and conformity, the upholstery layers are just a bit on the firmer side. The Black Opal is an excellent option if you’re looking for a medium-firm bed.  Also, if you’re at slightly different ends of the comfort spectrum from your sleeping partner, this might be a good option for you. Still, don’t ever buy a bed without your sleeping partner trying it first, it’s just never a good idea.

Not Too Hard; Not Too Soft!
A cushion firm mattress usually has a little bit of give, yet still provides a generally firmer sleeping surface.
If soft mattresses cause you to wake in pain, a cushion firm may be ideal for you.


Go Ahead And Sit On It!
The StableEdge™ system allows you to sleep nearer the edge, giving you maximum sleeping surface. Foam-encased mattresses have an edge that bends when you sit on it, causing you to slide off. The reinforced edge constructed by Sealy, allows you to put weight on the edge without the mattress completely losing support. The mattress features two rows of Quantum Edge Coils to provide edge-to-edge strength. The StableEdge™ lets you take advantage of your entire mattress, not just the middle.

A Long Time Favorite:
Quality and value combined make Sealy’s Crown Jewel Black Opal Cushion Firm a customer favorite for over four, wonderful years.
If you’re looking for more conformity in hips and shoulders, you may be interested in the softer version of this mattress, the Black Opal Plush.





Where is this bed made? Made in Medina, Ohio. U.S.A.
Fabric Material Quilted, Stretch-knit Tight Top
Quilting Material 1.0 oz. Non-Toxic FlameGuard™ Fiber
2" SealyComfort
Comfort Layers 1.5" SealyComfort™ Soft Foam
.5" SealyComfort™ Extra Soft Foam
.5" Gel Memory Foam
.5" CoreSupport Center™ (Center Third of Mattress)
Support System Individually-wrapped 15 Gauge Sealy StabilityPlus™ Coil
Sealy StableEdge™ System
Sealy Quantum Coil Edge Support
Spring Counts Twin: 336 TwinXL: 406 Full: 513 Queen: 638 King: 812 Cal-King: 810

Warranty Info

Warranty: 10 Year Non-Prorated Manufacturers Warranty

Items covered under limited warranty can include:
– Body impressions greater than 1.5″
– Shifting, bunching, or clumping of upholstery materials
– Coils or wires that are loose or broken
– Coils or wires that protrude through the fabric
– *Sagging: your sleep set must be continuously supported by an appropriate foundation, or equivalent, with a proper bed frame. The frame should include rigid center support with legs that support down to the floor.
*NOTE: A mattress warranty will be considered void in the event of any staining or being in an unsanitary condition.

Items covered under Foundation warranty can include:
– Splits in the wood frame
– Squeaking, rattling or other non-typical noises
– Broken, loose, or defective boards
– Loose or broken module wires

The Warranty does NOT cover:
– Soiled or stained products
– Damage incurred from using an improper foundation. *See our FAQ section about this issue
– Mattress fabric

Additional information

Dimensions 10 × 10 × 10 in
Mattress Size:

Twin, TwinXL, Full, Queen, King, Cal-King


Mattress Alone, 5" or 9" Sealy Foundation, Ease 3.0 Adjustable Base

Quilt Layers

1.0 oz. Non-Toxic FlameGuard™ Fiber, 2" SealyComfort Foam

Comfort Layers

.5" CoreSupport Center™, .5" Gel Memory Lumbar Layer, .5" SealyComfort™ Extra Soft Foam, 1.5" SealyComfort™ Soft Foam

Support System

Individually Wrapped Sealy StabilityPlus™ Coil 15 Gauge

Where is this bed made?

Medina, Ohio

Mark Ackley

Delivery Specialist

Mark is one of our longest-term employees and definitely one of the guys you want along while bringing in your new mattress.  Even though he shares some traits with a gorilla, he’s really one of the gentle-giant types.

When Mark isn’t at Mattress Mart, he enjoys spending time at his campsite relaxing and fishing, and at home with the wife and kids.

Jack the Dog

Official Mascot

When not being cute, Jack spends his free carrying his food, piece-by-piece, across the house to eat, running through any and all sorts of muck he can find, chasing squirrels, and carrying his special bone. One of the great cuddlers of all time, Jack curls up to in a surprisingly small ball on the couch, where he’s technically not allowed. Jack also enjoys running away to the house next door to visit his best friend, Vince, a rottweiler/doberman mix.

Jack is spoiled beyond belief and spends his nights on a 100% latex dog mattress.

Matt Roemig


Matt is our newest, and youngest, employee and we’re doing our best to teach him everything he needs to know, and Matt is picking it up very quickly.

When not at Mattress Mart, Matt enjoys football, basketball, lifting light weights, and spending time with his brother and mother.

Make sure to make a point of saying Hello to Matt when you see him bringing your new mattress!

Sean Anderson


One of our newest employees, Sean has been with the Mattress Mart team for almost two years and has been a valuable addition to our second-to-none delivery crew.

Sean has a new child and when he’s not delivering your new bed, enjoys spending every moment he can with the new little one.

Sean is unique in that if it has wheels, Sean can either fix it or drive it.  Although not so great with antique car trivia, he’s great at diagnosing even the most odd engine problems.

Ryan Doremus

Senior Delivery Specialist

One of our most senior employees, Ryan has been with us for 20 years and there are very few people with more experience delivering your new mattress. Ryan will ensure your bed is brought in carefully, with consideration for your mattress and your home.

Ryan enjoys dividing his time between his wife, children, and the other baby in his life, his orange Jeep. If you drive by our Drake Rd. store, you can’t miss it!

Jeff Clements


We don’t get new employees very often, so we would like everyone to give a big hello to Jeff!  We have known Jeff for a number of years when he worked next to us at Sprint in Battle Creek. We are happy to have him aboard!

Jeff is a music lover and happens to be not in one, but two bands!  Come in and try to stump him at music trivia.

When not at work, Jeff loves spending time with his dog, Shiloh, cooking, and has a particular fondness for most things sci-fi, especially movies.

Stop by and welcome Jeff to the Mattress Mart family!

Zack Davis


Zack has been an invaluable member of Mattress Mart’s team since 2006. Zack is our resident expert on antique furniture and all things construction.
When not at Mattress Mart, Zack enjoys spending time with his wife and dog, finding new and interesting places to eat, and perusing antique shops around the Midwest.

Patrick Hope

Sales | Inventory Specialist

Patrick was a member of the Mattress Mart family for 18 years. Sadly, on December 29, 2020, Patrick Hope passed unexpectedly due to an automobile collision.

If you had a question, problem, or concern, Patrick was second to none in getting it done, which is why he was one of the most valued members of Mattress Mart.

Patrick was an avid and consummate fisherman, spending most of his time casting for the next big one. Although he regularly entered D&R’s big fish tournament, he never won.  Snowmobiling, the Upper Peninsula, his family, and friends…Patrick loved it all. 

Patrick will be missed greatly. 

Kevin Fleckenstein

Warranty Specialist | Manager | Sales

Since 1997, Kevin has been a valued member of the Mattress Mart family. As the customer service and warranty specialist, chances are that if you have a unique problem, Kevin may be the one helping you.
When not at Mattress Mart, Kevin enjoys the fruits (or vegetables) of the labor from his garden, golfing, spending as much time in the woods as possible (don’t bother asking about his favorite mushroom hunting spots!) and is an avid ping pong-er.
During his travels, Kevin has covered much of SW Michigan in his search for the hidden gems such as shops and restaurants that would typically fly under the radar. If you’re looking for a great recommendation, there’s nobody better to ask!

Larrs Morey

IT | Marketing | Web Manager | Sales

Larrs has been with Mattress Mart since 2002, and in that time has become a valuable members of the Mattress Mart family.

Larrs is the resident IT guy, web guy, marketing guy, and on most occasions you’ll find him on the floor, ready to help with some of the trickier questions regarding mattress specs. 


While not at work, Larrs enjoys a variety of activities, including, but not limited to: spending time with his wife and two children, playing with Jack the Dog, spoiling his pet chickens, wood carving, and much, much more.  

Guss Morey


Guss has been providing exemplary customer service, and interesting conversation, since 1999. If you’ve purchased a bed from us over the years, there’s a good chance it was from Guss.

When not at Mattress Mart, Guss enjoys spending time with his children and spoiling his grandchildren.  Among the many, many activities Guss enjoys are: making beautiful and one-of-a-kind barn quilts, turning bowls on his wood lathe, carving walking sticks, and making brooms with actual broom corn.

A huge fan of Futurama and Marilyn Monroe, beware that you’ll probably be late to any event should you bring either up!

Our company is a collective of amazing people striving to build delightful products.

It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal. It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using.