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), 1 Box Spring(s) 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 Maximum Weight Limit: 600 Lbs Base Material: 100% Polyurethane Comfort Type: Cushion Firm Mattress + Box Spring Measurements: 38 Width/Inches, 79 Length/Inches, 23 Depth/Inches Care: Spot Clean Certifications And Listings: Cpsc - 16 Cfr 1633 Compliant, Cpsc - 16 Cfr 1632 Compliant Country of Origin: Made in US Visit our Furniture & Mattress Customer Care Center for delivery options, protection plans and other services. Problem with an order or need help with a return? Our Furniture & Mattress Customer Service agents will be happy to help. Give us a call at 1-800-442-7902 Don’t forget to print off your delivery checklist to avoid any delays or issues when delivering your item. Set includes mattress plus box spring/foundation. King and Cal. King mattress sets feature 2-piece side-by-side foundations for easier navigation in tight spaces.