A champion of comfort for all, serta, inc. ("serta") has pioneered sleep innovation for more than 90 years, bringing quality products to more than 150 countries worldwide. Every bed across the serta®portfolio is designed to provide superior comfort, including the award-winning icomfort® collection. Icomforteco™ features select materials that are up to 70% sustainable, this supportive foam mattress was designed for sleep that's cool, comfortable, and restorative-with upgrades available for even more cooling, comfort, and pressure relief. Sustainable refers to plant-based foams & recycled fibers and varies by model. See serta.com for details. Cooltemp™ cover powered by reprieve™ - this cool-to-the-touch, breathable cover is made from recycled plastic bottles. Terrafusion™ memory foam - made from 30% plant-based materials that provides pressure relief and reduced motion transfer for uninterrupted sleep Deep reaction® max gel memory foam - a highly-dense memory foam with cushioning qualities that provide deep-down support for pleasurable sleep Latex layer - a responsive layer containing 20% natural latex that's breathable and supportive. Custom fit™ hd memory foam - a premium, high-density memory foam that conforms to your body for comfortable support all night long Serta foam core - durable edge-to-edge support for any sleep position to help you rest comfortably all night long Proudly 100% USA assembled Compatible with most frames, platforms and adjustable bases We only use foam that is Certipur-us certified Mattress Top Type: Tight Top Mattress Type: Memory Foam, Gel Memory Foam Included: 1 Mattress(es), 1 Box Spring(s) Features: Breathable, Antimicrobial, Foam Layer, Cooling Layer, Cushioning Layer, Temperature Regulating, Adjustable Base Compatible Additional Information: Relieves Pressure Points, Conforms To Body, Suitable for Adjustable Bed Frames, Eliminates Motion Transfer Manufacturer Warranty: 10 Year Bed Size: Twin Xl Maximum Weight Limit: 1000 Lbs Base Material: 100% Foam Comfort Type: Medium Mattress + Box Spring Measurements: 24 Height/Inches Care: Spot Clean Certifications And Listings: Certipur-Us Certified 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.