Experience support for more than just your body with the Harmony 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 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. A breathable, moisture-wicking fabric helps you sleep comfortably throughout the night. Pressure-relieving foams help ease aches and pains while also creating airflow throughout the mattress. Step-ups feature the additional cooling comfort of InfiniCool® and premium foams for 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.  Individually pocketed coils provide consistent head-to-toe support and advanced motion isolation for any sleep position Breathable, moisture-wicking fabric helps you sleep comfortably throughout the night 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. plastic bottles collected vary by model ranging from 30 to 50. 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: Moisture Wicking, Wrapped Coils, Breathable, Adjustable Base Compatible, Cooling Layer, Antimicrobial, Full Support, Foam Layer, Temperature Regulating, Cushioning Layer Additional Information: Suitable for Adjustable Bed Frames, Eliminates Motion Transfer, Relieves Pressure Points, Conforms To Body Coil Count: 439 Coils Manufacturer Warranty: 10 Year Limited Bed Size: Twin Measurements: 74.5 Length/Inches, 12 Depth/Inches, 38 Width/Inches Maximum Weight Limit: 1000 Lbs Base Material: 70% Metal, 30% Polyurethane Comfort Type: 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.