The Spring Air Back Supporter Hybrid Kaylee Extra Firm Mattress is a extra-firm pocketed-coil hybrid mattress built for stomach sleepers and plus-size sleepers needing maximum lift. Spring Air builds the original Four Seasons Free Arm pocketed-coil unit in the US, paired with high-density support foam and a quilted comfort top. At 14", it sits in the premium profile range — generous enough for adjustable bases yet still easy to sheet.
Individually wrapped coils flex independently for support that responds to your body, not the other way around.
A reinforced center third keeps the spine aligned across every position.
A tall comfort and support stack means more contour up top and stronger lumbar push-back below.
We deliver, set up in your bedroom, and haul away your old mattress — no extra charge.
A 9/10 firmness — supportive top with minimal contour. Best for back and stomach sleepers, plus heavier sleepers who want less hug.
Built for adaptive support and breathability. Every layer is hand-checked before it ships from our warehouse.
The Kaylee Extra Firm is the premium firm option in Spring Air’s Back Supporter lineup, featuring the upgraded 8-Series pocketed coil system. The 8-Series uses a taller, heavier-gauge coil with more individually wrapped springs than the Francesca’s standard coil system, providing enhanced zoned lumbar support, better motion isolation, and more responsive body contouring. At $1,499 Queen, the Kaylee is Spring Air’s premium Back Supporter hybrid.
The 8-Series is Spring Air’s premium coil system — taller (9 inches vs 8.5 in the Francesca), higher coil count, and heavier gauge for enhanced support under greater body weight. The extra firm configuration (approximately 8-9/10) delivers the firmest Back Supporter hybrid available. Gel-infused comfort foam on top provides cooling with minimal sinkage. The Back Supporter zoned lumbar support is more pronounced in the 8-Series because the taller coils allow more differentiation between support zones. Made in the USA. CertiPUR-US certified.
Stomach sleepers who want premium support — the firmest Back Supporter with the tallest coil system. Heavy back sleepers (200+ lbs) — 8-Series heavier-gauge coils maintain support under greater weight. Sleepers upgrading from the Francesca Firm — the 8-Series is a noticeable step up in coil quality and support precision. Hot sleepers who want firm — gel foam + tall coil airflow.
Three options at $1,499: Extra Firm 14", Medium 15.5", Plush 15.5". All use 8-Series Back Supporter coils. Try all three in our showrooms.
Twin, Twin XL, Full, Queen ($1,499), King, CA King. Free White Glove delivery. Call (800) 218-3578.
