Model found in: Sealy Response Essentials Castra IV Firm 8.5 Inch King Mattress Only OVMB072036 - Overstock Model ''As-Is'', Joybed LXP Medium Firm 10 Inch King Mattress Only SDMB072002 - Scratch and Dent Model … These would be numbers used internally in order to track back the layer of foam, or in the case of the finished mattress, the model … You’ll find hybrid, innerspring, and memory foam mattresses … Unfortunately, these are numbers specific to Tempurpedic, either specific to the piece of foam or the actual completed mattress. Innerspring Mattresses The Response Line. :cheer: The first place to start your research is the Mattress Shopping Tutorial Select the Search Forum tab below to gain access to answers to many mattress … Welcome to The Mattress Underground FORUM! Memory Foam Mattresses … Response Line. We provide a mattress comparison chart and detailed information about each model so that you can confidently determine which mattress … Starting at $399. They’ve even introduced bed-in-a-box models for those who value convenience. At US-Mattress, we provide a huge range of Serta beds, with prices from about $500 to almost $3,000. Built with coils, the Response Line gives you a traditional sleep - on - top - feeling that responds to your every movement. At US-Mattress, our experts break down the specifications of every Sealy, Simmons, Stearns & Foster, and Serta mattress so you can know exactly what you can expect out of your purchase.