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® Max Technology with three layers of cooling: cooling fibers, plant-based cooling technology on cover, and carbon-infused foam to keep you cool and comfortable Beautyrest® Active Response™ Memory Foam with contouring comfort for your body helps alleviate aches and pains caused by pressure 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: Wrapped Coils, Adjustable Base Compatible, Breathable, Moisture Wicking, Cooling Layer, Full Support, Temperature Regulating, Cushioning Layer, Antimicrobial, Foam Layer Additional Information: Relieves Pressure Points, Conforms To Body, Suitable for Adjustable Bed Frames, Eliminates Motion Transfer Coil Count: 635 Coils Manufacturer Warranty: 10 Year Limited Bed Size: Twin Measurements: 74.5 Length/Inches, 38 Width/Inches, 13.5 Depth/Inches Maximum Weight Limit: 1000 Lbs Base Material: 70% Metal, 30% Polyurethane Comfort Type: Extra Firm Care: Spot Clean Certifications And Listings: Certipur-Us Certified, Seaqual Technology Country of Origin: Made in US Includes mattress only. Mattress plus box spring option also available.