Firm King Mattress 12 Inch - Hybrid Mattress for Extra Back and Lumbar Support - 365 Nights Trial & 10 Years Warranty

Firm King Mattress 12 Inch — mattresses in every size and firmness — memory foam, hybrid, and innerspring.

Key Features

• 12 Inch King Mattress / Medium Firm Hybrid Mattress King Size
• Optimal Firmness Where You Need It - Hundreds of high-compression springs adapt to your body's unique curves, delivering targeted support and pressure relief. Reinforced with industrial-grade steel, these springs hold their shape for years of use. So you wake up without stiffness - just refreshed, balanced comfort
• Breathable Mattress King Size - Unlike all-foam mattresses that trap heat, this coil-and-foam hybrid mattress combines responsive coils with premium foam layers to promote continuous airflow. The open structure of the hybrid system acts like tiny ventilation channels, helping you stay comfortable throughout the night
• Ideal Spinal Alignment for All Positions - Engineered to maintain optimal spinal alignment all night, this king mattress caters to all sleep positions. Side sleepers enjoy perfect cushioning for shoulders and hips, back sleepers receive enhanced lumbar support, while combination sleepers experience effortless transitions - all for deeper, restorative rest
• Motion Isolation for Undisturbed Sleep - Sleep soundly through any movement with the advanced pocketed coils. This independent spring design absorbs 83% of motion before it reaches your side of the bed, creating a personal sleep zone that stays perfectly still - no matter how much your partner moves
• Fiberglass-Free, Certified Materials - Worried about chemicals in your mattress? 12-inch mattress king contains no fiberglass or off-gassing. With ultra-low VOCs that meet strict CertiPUR-US standards, it lets you breathe easy and sleep safe with your family

Specifications

Free shipping included. 30-day hassle-free returns.