Experience support for more than just your body with the Harmony Lux Collection. Innovative materials work harmoniously to bring you restorative sleep with improved support, advanced motion isolation, and a lush cover made from plastic bottles diverted from the ocean. The Precision Support System offers 40% more support coils compared to Harmony models for even more head-to-toe support across the entire mattress, so you and your partner sleep undisturbed. Up to 100 plastic bottles collected by hand from coastlines and ocean-bound waterways have been transformed into premium fabric to create a lush, durable sleep surface that helps contribute to cleaner water. InfiniCool® Lux technology helps you stay comfortably cool all night with its breathable, moisture-wicking fabric infused with cooling fibers and plant-based cooling technology. Pressure-relieving foams help ease aches and pains while also creating airflow throughout the mattress. Step-ups feature bio-charcoal cooling foam and 2x the memory foam enhanced pressure relief. All models are crafted with a lofty, quilted top, making them perfect for those who prefer a lifted feel and want rejuvenating sleep each and every night. Collected from areas within 50km of coastlines. Plastic bottles collected vary by model ranging from 60 to 100. With 40% more coils than Harmony models that offer increased support for any sleep position and undisturbed rest InfiniCool® Lux Technology with breathable, moisture-wicking fabric and plant-based cooling technology deliver advanced cooling for comfortable sleep Beautyrest® Active Response™ Memory Foam with contouring comfort for your body helps alleviate aches and pains caused by pressure A lush sleep surface made from up to 100 recycled plastic bottles collected by hand from oceans and within 50 km of coastlines. Adjustable base friendly - helps reduce snoring and makes reading or watching tv more comfortable We stand by our beautyrest mattresses with a 10-year limited warranty All our mattresses are proudly assembled in the USA  Mattress Top Type: Tight Top Mattress Type: Innerspring Included: 1 Mattress(es) Features: Breathable, Moisture Wicking, Wrapped Coils, Adjustable Base Compatible, Full Support, Foam Layer, Temperature Regulating, Antimicrobial, Cooling Layer, Cushioning Layer Additional Information: Suitable for Adjustable Bed Frames, Eliminates Motion Transfer, Conforms To Body, Relieves Pressure Points Coil Count: 635 Coils Manufacturer Warranty: 10 Year Limited Bed Size: Twin Measurements: 13.5 Height/Inches, 74.5 Length/Inches, 38 Width/Inches Maximum Weight Limit: 1000 Lbs Base Material: 70% Metal, 30% Polyurethane Comfort Type: Plush Care: Spot Clean Certifications And Listings: Seaqual Technology, Certipur-Us Certified Mattress Height: 13.5" 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. Includes mattress only. Mattress plus box spring option also available.