St. Simons Firm

Buy if: You prefer a firm, supportive hybrid with individually wrapped coils, reinforced PowerEdge® edges and a 10-year non-prorated warranty at a budget-friendly price.

Cooling LevelGood
Type of MattressHybrid
FirmnessFirm 8/10
Firm Feel

St. Simons Firm

Original price was: $833.32.Current price is: $499.99.

Excluding Sales Tax | Free Shipping Included

The Premier Mattress Direct Difference

Try Before You Buy

Test leading brands in our Palm Harbor showroom

Free Shipping

Included in our prices

Slumber Bucks

Earn loyalty points on every purchase

Giving Back

Supporting Beds4Kids and local youth sports

Meet The St. Simons Firm

Designed by Southerland, an American mattress manufacturer with over 130 years of experience, the St. Simons Firm pairs durable coil support with a firm, dependable feel at a budget-friendly price.

PowerEdge® Coil Support An 8" 800 Series individually wrapped coil system supports the back and body, reduces motion transfer and reinforces the edges.
Certified Foams and Warranty CertiPUR-US® certified foams and a 10-year non-prorated warranty back this firm hybrid.

How Does It Feel?

Firm Feel:
  • Firm overall feel with strong support
  • Light cushioning from high-density quilt foam
  • Reinforced edges let you use the full surface
  • Responsive coils that limit motion transfer
Firm Feel
SoftFirm

Deeper Sleep Built Into Every Layer

What it is:

A knit fabric cover quilted with high-density foam.

How it helps you sleep:

Gives you a clean, comfortable surface while keeping the overall feel firm.

What it is:

A 1" layer of high-density comfort foam.

How it helps you sleep:

Adds just enough cushioning to relieve pressure while keeping the mattress stable.

What it is:

An 8" system of individually wrapped coils with PowerEdge® support.

How it helps you sleep:

Provides strong back and body support, reduces motion transfer and reinforces the edges.

What it is:

A high-density base support foam.

How it helps you sleep:

Absorbs shock and gives the mattress a solid, durable foundation.

Product Description

PRODUCT DESCRIPTION

If you’re looking for a supportive, firm mattress without the premium price tag, the St. Simons Firm is an outstanding value. Designed by Southerland—an American mattress manufacturer with over 130 years of experience—and now powered by 3Z Brands, this mattress focuses on delivering durable support and dependable comfort at a budget-friendly price.

A premium knit fabric cover with high-density quilt foam provides a clean, comfortable sleep surface while maintaining a firmer overall feel. Beneath the cover, high-density comfort foam adds just enough cushioning to relieve pressure while still keeping the mattress supportive and stable.

At the heart of the mattress is an 8″ 800 Series individually wrapped coil system with PowerEdge® support. These responsive coils provide strong back and body support, help reduce motion transfer between sleepers, and reinforce the edges so you can comfortably use the full surface of the mattress.

A high-density base support foam completes the design, absorbing shock and providing a solid foundation that enhances durability and long-term performance.

For shoppers who want firm support, reliable construction, and excellent value, the St. Simons Firm delivers quality that often exceeds what you’ll find in many mattresses at this price point. It’s a smart choice for anyone who prefers a sturdier feel and wants a mattress that will hold up well night after night—without stretching the budget.

KEY FEATURES

  • Firm comfort level – great for sleepers who prefer strong support
  • Premium knit cover with high-density quilt foam
  • 1″ high-density comfort foam for lasting cushioning
  • 8″ 800 Series individually wrapped coils with PowerEdge® support
  • High-density base foam for durability and motion reduction
  • Adjustable base friendly
  • CertiPUR-US® certified foams
  • 10-year non-prorated warranty
  • Overall Height: ~11″

FAQs

Have a question?

Visit our Palm Harbor showroom at 36243 US Hwy 19 N, Palm Harbor, FL 34684, or give us a call.

Mon-Sat 10am-7pm · Sun 1pm-7pm

How firm is the St. Simons Firm?

It has a firm comfort level made for sleepers who prefer strong support. The quilt foam and 1" comfort foam add a little cushioning on top, but the overall feel stays sturdy.

What is inside the St. Simons Firm?

A premium knit cover with high-density quilt foam, 1" of high-density comfort foam, an 8" 800 Series individually wrapped coil system with PowerEdge® support, and a high-density base foam.

Is the St. Simons Firm a good choice for couples?

The individually wrapped coils and high-density base foam help reduce motion transfer between sleepers, and PowerEdge® support reinforces the edges so you can use the whole mattress.

How tall is it, and will it work on an adjustable base?

The St. Simons Firm is about 11" tall and is adjustable base friendly.

Are the foams certified, and what is the warranty?

The foams are CertiPUR-US® certified, and the mattress is backed by a 10-year non-prorated warranty.

What sizes does the St. Simons Firm come in?

It is available in Twin, Twin XL, Full, Queen, King and Cali-King. Pick your size above to see the price.

Is shipping included in the price?

Yes. Prices on our site include free shipping and exclude sales tax.

How do I get the Premier Mattress Direct special price?

Choose your size, then click "Get Premier Mattress Direct Special Price" and enter your details to receive an exclusive in-store offer on the St. Simons Firm. There is no obligation to purchase.

See Other Mattress Models

Where should we send your exclusive Premier Mattress Direct Price?

Enter your information below to unlock your exclusive in-store mattress offer. No obligation to purchase.