Launch Gift (through August 2): every Diamond comes with free Stitchco pillows — one with Twin, Twin XL & Full, two with Queen, King & Cal King. Add this mattress to your cart, then pick your free pillow(s) here — they ring up $0 at checkout, automatically. The Diamond is the top of the Stitchco line — a smooth-top hybrid with our most advanced cooling system. Named for the Arkansas state gem (Arkansas is home to the only public diamond mine in the U.S.), it pairs a sleek 14" smooth-top profile with premium materials throughout. Its standout layer is a copper-, graphite-, and silver-infused memory foam that dissipates heat, stays fresh, and delivers exceptional pressure relief, backed by responsive Serene® hybrid foam, a latex lumbar support layer, and the 8" zoned pocketed coil. What's inside Ultra Luxury Cooling Fabric — cool-to-the-touch premium cover, in a clean smooth-top profile. Copper, Graphite & Silver Infused Visco — premium memory foam that dissipates heat, maintains freshness, and relieves pressure. Serene® Hybrid Foam — responsive, non-temperature-sensitive foam for consistent comfort. Latex Lumbar Support Layer — reinforced latex for spinal alignment and lower-back comfort. 8" 1044 Zoned Pocketed Coil — targeted support, reduced motion transfer, lasting durability. Feel & firmness Available in Firm, Medium, and Plush. A smooth, even top surface over premium cooling foams and hybrid support — the most advanced feel in the line. Specs Overall height: 14" (±1") Hybrid construction (foam + pocketed coil) Made in the USA with domestically and globally sourced materials CertiPUR-US certified foams 10 year warranty Available in Twin, Twin XL, Full, Queen, King, and Cal King.
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