King Size 12" Hybrid Mattress in a Box

Updated August 13, 2026

est.MSRP: $252 Condition: NEW- Brand: HeySleep Model: Hybrid Mattress ASIN: B0GRHJ36TC KING HYBRID MATTRESS 12 INCH MEDIUM PLUSH COMFORT FOR SIDE & BACK SLEEPERS: This King size mattress combines responsive memory foam with a 7-zone pocket spring system to deliver the perfect balance of softness and support. Designed for side and back sleepers, it cushions pressure points while maintaining proper spinal alignment making it an ideal King mattress for everyday comfort and deeper sleep. MOTION ISOLATION KING MATTRESS QUIET, UNDISTURBED SLEEP: Built with 1024 individually wrapped pocket springs, this King hybrid mattress absorbs movement and reduces motion transfer. Whether you're sharing your mattress in a box with a partner, child, or pet, you'll enjoy a quiet, stable sleep surface with minimal noise or disruption. REINFORCED EDGE SUPPORT: This 12 inch King mattress is built with 30% higher-density edge coils, 3 rows of reinforced perimeter springs, and an upgraded 2.3 mm pocket coil system for lasting durability. Designed to deliver reliable support even under increased weight, it's an excellent choice for those searching for a mattress for heavy people. Sit, sleep, or relax near the edge with confidence the surface stays consistently supportive from edge to edge, so the entire mattress feels stable and secure. COOLING MEMORY FOAM KING MATTRESS BREATHABLE & PRESSURE RELIEVING: Designed with gel-infused memory foam and breathable fabric, this cooling King mattress helps regulate temperature and improve airflow. It relieves pressure on shoulders and hips while keeping you cool, dry, and comfortable throughout the night. SAFE, CERTIFIED & MATTRESS IN A BOX: Made F b rg ss-Fr with CertiPUR-US certified foam and compliant with 16 CFR 1632 & 1633 U.S. flammability standards for safer sleep. This mattress in a box is compressed for easy delivery just unbox, unroll, and expand within 48 72 hours. Compatible with most bed frames.

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