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Mattresses


Mattresses are arguably the most important item in your whole home. Getting a great night's sleep is essential and comfortable mattresses are a great way to ensure one. This is a big purchase so it's important to do a little research about mattresses to ensure the perfect fit.Read More


Cymax offers mattresses in all the standard sizes. Twin mattresses are the perfect fit for your kids bedroom while full mattresses are perfect for teens or small master bedrooms. Queen mattresses are still our most popular size but you might prefer to stretch out with a king size mattress instead. We have innerspring, pocketed coil and memory foam mattresses from major mattress name brands, including Simmons mattresses and Comfort Magic mattresses.


Not what you are looking for? See our selection of beds or see our bedroom furniture for all the options.


68 items found for
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King Ready to Assemble Mattresses
Filtered by: King Remove Ready to Assemble Remove Mattresses Remove clear all

save

60%

$445.95

$602.99 retail

FREE SHIPPING

Comfort Magic 8 Inch Memory Foam Mattress - King

(Also available in Twin, Twin XL, Full, Queen)

8"H x 76"W x 80"D   344849

save

60%

$714.00

$1,222.99 retail

FREE SHIPPING

Comfort Magic Plush Firm 14 Inch Memory Foam Mattress - King

(Also available in Full, Queen)

14"H x 76"W x 80"D   352763

save

35%

$373.99

$309.99 retail

FREE SHIPPING

Signature Sleep 10 Inch RenewFoam Gel Memory Foam Coil Mattress - King

(Also available in Twin, Full, Queen)

10"H x 76"W x 80"D   493456

save

37%

$418.99

$439.99 retail

FREE SHIPPING

Signature Sleep 10 Inch Essence 5-Zone Memory Foam Mattress - King

(Also available in Full, Queen)

10"H x 76"W x 80"D   493458

save

46%

$651.12

$569.00 retail

FREE SHIPPING

Atlantic Furniture Contora Slumber Memory Foam Mattress - King

(Also available in Twin, Full, Queen)

11"H x 76"W x 80"D   431292

save

32%

$654.95

$731.99 retail

FREE SHIPPING

Abbyson Living "The Green Sleep" 12" Memory Foam Mattress - King

(Also available in Queen, California King)

12"H x 76"W x 80"D   466163

save

36%

$1,151.99

$1,139.00 retail

FREE SHIPPING

Coaster Milano 10" Memory Foam Mattress - California King

(Also available in Twin XL, Queen, King)

10"H x 72"W x 84"D   359996

save

30%

$1,994.00

$2,299.00 retail

FREE SHIPPING

Coaster Arese 13" Pillow Top Memory Foam Mattress - King

(Also available in Queen, California King)

13"H x 76"W x 80"D   359997

save

60%

$692.95

$1,169.99 retail

FREE SHIPPING

Comfort Magic Plush 14 Inch Memory Foam Mattress - King

(Also available in Full, Queen, California King)

14"H x 76"W x 80"D   352764

save

45%

$315.99

$389.99 retail

FREE SHIPPING

Signature Sleep 10 Inch Sunrise 5-Zone Conforma Coil Mattress - King

(Also available in Full, Queen)

10"H x 76"W x 80"D   493455

save

36%

$361.99

$389.99 retail

FREE SHIPPING

Signature Sleep 10 Inch Evolution Euro Top Fresh Foam - King

(Also available in Full, Queen)

10"H x 76"W x 80"D   493457

save

80%

$535.44

$1,722.50 retail

FREE SHIPPING

Comfort Magic BIOS 10 Inch Back Support Foam Mattress - King

(Also available in Twin, Full, Queen)

10"H x 76"W x 80"D   443748

save

39%

$509.85

$539.00 retail

FREE SHIPPING

Wolf Sleep Magic Ortho Ultra Pillow Top Innerspring Mattress - King

(Also available in Twin, Full, Queen)

12"H x 76"W x 80"D   431879

save

60%

$594.99

$924.99 retail

FREE SHIPPING

Comfort Magic 10 Inch Total Relief Memory Foam Mattress - King

(Also available in Twin, Full, Queen)

10"H x 76"W x 80"D   444724

save

30%

$417.55

$329.00 retail

FREE SHIPPING

Wolf Sleep Magic Mateo Innerspring Mattress - King

(Also available in Twin, Full, Queen)

10"H x 76"W x 80"D   431874

save

65%

$564.99

$849.99 retail

FREE SHIPPING

Comfort Magic 10 Inch Shoulder and Neck Support Foam Mattress - King

(Also available in Twin, Full, Queen)

10"H x 76"W x 80"D   444725

save

60%

$579.95

$762.99 retail

FREE SHIPPING

Comfort Magic Firm 11 Inch Memory Foam Mattress - California King

(Also available in Twin, Full, Queen)

11"H x 72"W x 84"D   352759

save

38%

$409.99

$369.00 retail

FREE SHIPPING

Wolf Sleep Magic Ortho Ultra Firm Innerspring Mattress - King

(Also available in Twin, Full, Queen)

10"H x 76"W x 80"D   431877

save

80%

$528.62

$1,705.00 retail

FREE SHIPPING

Comfort Magic BIOS 10 Inch Energizing Performance Foam Mattress - King

(Also available in Twin, Full, Queen)

10"H x 76"W x 80"D   443749

save

60%

$497.95

$724.99 retail

FREE SHIPPING

Comfort Magic Plush 11 Inch Memory Foam Mattress - King

(Also available in Full, Queen)

11"H x 76"W x 80"D   352761

save

35%

$530.86

$419.00 retail

FREE SHIPPING

Wolf Sleep Magic Verde Innerspring Mattress - King

(Also available in Twin, Full, Queen)

11"H x 76"W x 80"D   431875

save

40%

$409.99

$409.00 retail

FREE SHIPPING

Wolf Sleep Magic Ortho Ultra Plush Innerspring Mattress - King

(Also available in Twin, Full, Queen)

10"H x 76"W x 80"D   431878

save

44%

$539.88

$509.00 retail

FREE SHIPPING

Wolf Sleep Magic Sedona Innerspring Mattress - King

(Also available in Twin, Full, Queen)

12"H x 76"W x 80"D   431876


Featured reviews

Simmons BeautySleep Champlain Pillow Top Mattress Set


 
 

any place with my family
- Shopper in beltsville md.

Wolf Mattress Back Aid Mattress


 
 

For my guest bedroom it's real soft and comfortable
- Shopper in New York City

Simmons BeautySleep Marlanta Visco Plush Pillow


 
 

Cymax said "Foundation included" and it only came with the mattress. Tried calling only to be told average wait is over 25 minut ...    Read more
- Shopper in Seattle WA


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