It all started with our introduction of the World's Premier Support system: our Beautyrest® Pocketed Coil® springs which move individually to support the natural shape of your body, and diffuse movement for a peaceful, undisturbed rest. Since then, Beautyrest has led the way in introducing a wide range of advancements that help you sleep your best so you can Be More-Awake Benefits: WORLD'S PREMIER SUPPORT SYSTEM 800 Series Beautyrest® Pocketed Coil® Technology provides flexible support precisely where its needed and isolates motion between two sleepers. IDEAL SLEEP TEMPERATURE DualCool® Technology An antimicrobial performance layer works to keep your mattress fresh and cool while moving heat and moisture away so you sleep at your ideal temperature. PRESSURE RELIEVING COMFORT Gel Memory Foam Lumbar Support - Get support and pressure relief right where you need it most. Mattress Top Type: Pillow Top Mattress Type: Innerspring Included: 1 Mattress(es), 1 Box Spring(s) Features: Fire Resistant, Wrapped Coils, Adjustable Base Compatible Coil Count: 465 Coils Manufacturer Warranty: 10 Year Limited Bed Size: Twin Base Material: 100% Polyester Comfort Type: Plush Mattress + Box Spring Measurements: 22.5 Depth/Inches, 74 Length/Inches, 38 Width/Inches Care: Spot Clean Certifications And Listings: 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. This mattress meets the requirements of 16CFR Part 1632 (federal flammability (open flame) standard for mattresses and mattress pads