10 Year Warranty

The Zest Extra Firm by International Bedding (IBC) is an updated version of the best-selling Corvina Firm. This new model is even firmer, making it the hardest mattress that we've encountered in our many years in the sleep product industry! 

Relatively low-priced, this mattress has many features that aren't seen presently, on the sales floors of retail outlets. A two-sided design harkens back to the days of old - when a mattress truly lasted the test of time. It also possesses the all-but nonexistent heavy duty, metal wire perimeter. 

The LFK Coil system is mostly known for its notable comfort and luxurious properties, it is also a spring that is designed to last. A Continuous Coil, just a glance at a diagram detailing its properties can show you the significant differences between it and more commonly sold support systems. 

American-made and composed of top quality materials, the Zest is made to last and provide years and years of support. We are sure to be shipping plenty of these out, in both standard and odd sizes

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Zest - Extra Firm, Two-Sided Mattress

SALE reg.
Twin $867 $1,100
Twin XL $924 $1,200
Full $1,087 $1,425
Queen $1,197 $1,575
King $1,665 $2,200
Cal King $1,799 $2,275
Other sizes

free shipping

Mattress Scale
extra firm mattress
Approx. Height of Set: 22" (Matt 13.0" Base 9")

This Mattress Features:


TENCEL Cover Layer
Fire Retardant Fiber
Two 3/4" Quilt Foam Layers

Mattress(Top Side)
2" Extra Firm Support Foam Layer

800 Premium LFK InnerSpring w/Edge Supports

Mattress(Bottom Side)
2" Extra Firm Support Foam Layer

Cover(Bottom Side)
Two 3/4" Quilt Foam Layers
Fire Retardant Fiber
TENCEL Cover Layer


Optional Matching Standard Wood Foundation

10 Total Years (10 full)

Zest - Extra Firm, Two-Sided Mattress

The 'extra' in this International Bedding model's name is no exaggeration. This is, without a doubt, the firmest mattress that Michigan Discount Mattress has seen, in over a decade of business. A heavy duty coil (LFK) and extra firm, high density layers make this bed the ideal sleeping surface for those who want absolutely zero cushion and who'd like for their mattress to last a very, very long time. 

The Tencel fabric color is a nice touch; Tencel is more natural than most conventional outer materials and it also has antimicrobial qualities. Beneath that is a very strong buildup of materials like a thick extra firm layer and a high coil-count, high-comfort spring unit. 

In addition to all of these great features, the Zest Extra Firm also possesses a heavy duty wire edge and a double-sided (flippable) design that adds to durability. 

Bravo! International bedding has produced an impressive bed that's like no other. It's even available in custom (odd) sizes, for many different needs. 


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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.
  • Nationwide and "free" rates are valid to most cities in the continental US. Destination must be accessible by large truck. Some locations may have a small surcharge.
  • For complete details, read our Shipping and Return policies.
  • Please call customer service for returns.

For local delivery rates and polices, check the Delivery Page



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