Experience support for more than just your body with the Harmony Hybrid Collection. Innovative materials work harmoniously to bring you restorative sleep with improved support, advanced motion isolation, and a lush cover made with plastic bottles diverted from the ocean. The Precision Support System offers consistent support across the entire mattress, from head to toe, so you and your partner sleep undisturbed. Up to 50 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® helps you stay comfortably cool all night with its breathable, moisture-wicking fabric infused with cooling fibers. Pressure-relieving foams help ease aches and pains while also creating airflow throughout the mattress. All models are crafted with a smooth, body-contouring memory foam top perfect for anyone who loves the feeling of being cradled by their mattress and want rejuvenating sleep each and every night.  Individually pocketed coils provide consistent head-to-toe support and advanced motion isolation for any sleep position Premium cooling for comfortable sleep with a breathable, moisture-wicking fabric and InfiniCool® technology containing cooling fibers Premium Beautyrest® Active Response™ Memory Foam with contouring comfort for your body to help alleviate aches and pains caused by pressure A lush sleep surface made from up to 50 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: Hybrid Included: 1 Mattress(es) Features: Wrapped Coils, Adjustable Base Compatible, Breathable, Cushioning Layer, Cooling Layer, Temperature Regulating, Antimicrobial, Foam Layer, Full Support Additional Information: Suitable for Adjustable Bed Frames, Relieves Pressure Points, Conforms To Body, Eliminates Motion Transfer Coil Count: 439 Coils Manufacturer Warranty: 10 Year Limited Bed Size: Twin Measurements: 38 Width/Inches, 74.5 Length/Inches, 12.5 Depth/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 Country of Origin: Made in US Includes mattress only. Mattress plus box spring option also available.