Katrina Firm Spring Air Full Mattress
Experience the legendary quality of Spring Air’s Back Supporter line, known for advanced coil technology and exceptional back support since 1926. Expertly crafted by Sound Sleep Products in Lacey, Washington, the Katrina Extra Firm brings that time-honored comfort and durability to your bedroom with modern materials and precision engineering.
The Back Supporter Katrina Extra Firm (Model #3331) is built for sleepers who want maximum support and a truly firm sleeping surface. Ideal for back and stomach sleepers or anyone who prefers less sink and strong spinal alignment, this hybrid delivers the signature Spring Air “just right” feeling with excellent edge-to-edge support and durability.
Precision Hybrid Construction
This extra-firm mattress features an 8" 3-Zone Encased Coil system with foam encasement for zoned lumbar support, motion isolation, and long-lasting performance. The comfort layers are engineered for a structured, supportive feel with just enough contouring:
- 1" Soft Quilt Foam + 1" Firm Quilt Foam — Layered quilting for initial comfort and support
- 1.5" HD Super Soft Memory Foam — Gentle contouring and pressure relief
- 7/8" Firm Foam + 7/8" Medium Plush Foam + 7/8" Firm Foam — Balanced transition layers for firm, responsive support
- 8" 3-Zone Encased Coil + Foam Encasement — Zoned support and edge stability
- 7/8" Firm Support Foam — Solid, durable foundation
Why You’ll Love the Katrina Extra Firm
- Extra firm feel with outstanding spinal alignment and back support
- Pressure relief from memory foam without sacrificing firmness
- Strong edge support from the foam-encased coil system
- Durable, responsive hybrid construction built to last
- Made in the USA with CertiPUR-US certified foams
Proudly manufactured in the Pacific Northwest by Sound Sleep Products — a trusted local producer with decades of expertise.
Available Sizes: Twin, Twin XL, Full, Queen, and King
Come visit us in store
Experience the legendary quality of Spring Air’s Back Supporter line, known for advanced coil technology and exceptional back support since 1926. Expertly crafted by Sound Sleep Products in Lacey, Washington, the Katrina Extra Firm brings that time-honored comfort and durability to your bedroom with modern materials and precision engineering.
The Back Supporter Katrina Extra Firm (Model #3331) is built for sleepers who want maximum support and a truly firm sleeping surface. Ideal for back and stomach sleepers or anyone who prefers less sink and strong spinal alignment, this hybrid delivers the signature Spring Air “just right” feeling with excellent edge-to-edge support and durability.
Precision Hybrid Construction
This extra-firm mattress features an 8" 3-Zone Encased Coil system with foam encasement for zoned lumbar support, motion isolation, and long-lasting performance. The comfort layers are engineered for a structured, supportive feel with just enough contouring:
- 1" Soft Quilt Foam + 1" Firm Quilt Foam — Layered quilting for initial comfort and support
- 1.5" HD Super Soft Memory Foam — Gentle contouring and pressure relief
- 7/8" Firm Foam + 7/8" Medium Plush Foam + 7/8" Firm Foam — Balanced transition layers for firm, responsive support
- 8" 3-Zone Encased Coil + Foam Encasement — Zoned support and edge stability
- 7/8" Firm Support Foam — Solid, durable foundation
Why You’ll Love the Katrina Extra Firm
- Extra firm feel with outstanding spinal alignment and back support
- Pressure relief from memory foam without sacrificing firmness
- Strong edge support from the foam-encased coil system
- Durable, responsive hybrid construction built to last
- Made in the USA with CertiPUR-US certified foams
Proudly manufactured in the Pacific Northwest by Sound Sleep Products — a trusted local producer with decades of expertise.
Available Sizes: Twin, Twin XL, Full, Queen, and King
Returns Policy
Please contact the store for shipping questions.