Every stearns & foster® lux hybrid 14" firm mattress is crafted to redefine what a hybrid mattress can be, with a unique feel that’s unmatched by any other hybrid. Our exclusive perfectform™ hybrid system—only available in stearns & foster® lux hybrid mattresses—adds a layer of our signature memory foam to the top of each coil, creating hundreds of individual coil pockets that offer incredible airflow while perfectly conforming to your body.  Mattress Top Type: Tight Top Mattress Type: Hybrid Included: 1 Mattress(es) Features: Full Support, Wrapped Coils, Adjustable Base Compatible Additional Information: Suitable for Adjustable Bed Frames Coil Count: 348 Coils Manufacturer Warranty: 10 Year Limited Bed Size: Twin Xl Measurements: 38 Width/Inches, 14 Depth/Inches, 79 Length/Inches Maximum Weight Limit: 600 Lbs Base Material: 100% Polyurethane Comfort Type: Medium Care: Spot Clean Certifications And Listings: Cpsc - 16 Cfr 1633 Compliant, Cpsc - 16 Cfr 1632 Compliant Country of Origin: Made in US Includes mattress only. Mattress plus box spring option also available.