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Introducing the Sleepmax Firm Hybrid Mattress - where lab-engineered cooling meets precision support! Our firm king hybrid mattress features gel-infused memory foam technology that actively pulls heat away, keeping you 3.8°F cooler all night. The 760+ pocket-spring core delivers firm mattress king perfection—zoning support for hips, shoulders, and back without motion transfer.Firm king mattress in a box convenience meets luxury—engineered for dream-filled nights!
760+ SPRINGS - PRECISION BACK SUPPORT: Industry-first king firm mattress with 760+ individually wrapped coils. Each spring works like a micro-engine:30% denser edge support prevents 40% sagging; firm king mattresses targets hips/shoulders/spine with balanced support. Your back floats on a cloud— king mattress firm comfort meets orthopedic-grade alignment!
COMFORTABLE SLEEP: Engineered with Sleepmax cooling tech: 12 inch firm king mattress features gel-infused knit fabric that sucks heat away like a micro-net, paired with 3D airflow foam boosting breathability. Lab-verified 3.8°F cooler than traditional mattresses. Wake up refreshed, never sticky—perfect for couples sharing this firm 12 inch mattress!
MOTION ISOLATION: Partner tossing? Pet jumping? Our firm mattress king absorbs 95% movement! High-density foam + pocket springs create a silent shield. Movements fade like leaves on water—your deep sleep stays untouched.
DOUBLE-CERTIFIED SAFETY & SKIN-FRIENDLY: CertiPUR-US + OEKO-TEX certified mattress king with zero fiberglass. Every breath feels like a forest breeze—safety is our first language!
MATTRESS IN A BOX - 3-STEP SETUP: king mattresses in a box revolution:Unroll →Cut wrap → Watch it rise! Expands to king firm hybrid mattress in 24-48 hrs. Fits all bed frames . From delivery to dreamland—faster than brewing coffee!
