Spring Air Cassie Select Firm 15.75" Queen Mattress Set Sale!

Spring Air Cassie 15.75″ Plush King Mattress Set

$1,899.99 $1,399.99

The 15.75″ Select Firm Mattress by Spring Air offers incredible comfort and support. The Quantum Edge full surface adjustable pocket spring support system is designed for less edge roll off flexibility. The Avena Foam offers more responsive support than traditional memory foam while self-adjusting to key pressure areas. 1,344 microcoils are added to provide the right amount of support where you need it most. A luxurious Tru-Cool cover provides moisture management and a silky finish that is comfortable to even the most sensitive skin.


SKU: 9150SAB1-9960 Categories: , , Tags: , ,


  • Comfort level: Plush
  • Quantum Edge Full Sleeping Surface offers support and flexibility with less roll off
  • Multi-layer design
  • Low motion transfer
  • 360-degree foam encasement for increased edge support
  • Fire-retardant protection
  • 10-year warranty; non-prorated warranty
  • Handcrafted in the USA
  • Spring Air—trusted by millions since 1926
  • King: 76″ W x 80″ L
  • 15.75″ Select Firm Mattress with Avena Foam offers superior back support
  • Tru-Cool cover provides moisture management and a silky finish
  • Includes 9″ Foundation
  • Ideal for side and stomach sleepers
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Spring Air Cassie 15.75" Plush King Mattress Set
Average rating:  
 1 reviews
by Jammie D. on Spring Air Cassie 15.75" Plush King Mattress Set
No more shoulder pain

I became a side sleeper after 2 back surgeries in 1996, making it too painful to sleep on my back or stomach. 21 years of pressure on my shoulders every night left me with terrible joint and muscle pain, even with a double pillow top, medium-firm mattress. I tried a medium-firm memory foam mattress, but it was still too much pressure. During the worst pain, I was paying for 2 to 3 chiropractic adjustments per week along with some therapeutic massages which helped considerably, but the cause of the pain wasn't being addressed since I woke up in chronic pain all down my spine from tossing and turning most of the night. I've now been using my Spring Air for over 3 weeks and I'm mostly pain-free when I wake up in the morning. I don't wake up as often during the night and I fall back to sleep more quickly when I do. An added bonus is when I change the sheets, lifting the bed to change the fitted sheets is a breeze - no more struggling with the heavy corners

Additional information

Dimensions80 × 76 × 15.75 in
Box Spring - Foundation:

SEMI-Flex 9" Metal Support, SEMI-Flex Low-Profile Metal Support

Coil Counts:

King: 975

Coil System:

Pocket Spring System



Extra Support Structure

Quantum Edge – Edge to Edge Sleeping Surface

Made In:

USA: Corsicana Texas

Mattress Height:

15.75 Inches In Height

Quilt - Top of Mattress:

Nu-Temp Foam, SupportU Foam, ComfortU Foam


King: Width: 76 Length: 80


10-year warranty; non-prorated warranty