10 bestExtra Firm King Size Mattressof January 2025

Wakefit Mattress | 10 Years Warranty | ShapeSense Orthopedic Classic Memory Foam Mattress, Mattress Double Bed, 6-Inch Bed Mattress, King Size Mattress (78x72x6 Inches, Medium Firm, Space Grey)

Wakefit Mattress | 7 Years Warranty | Dual Comfort with Hard & Soft Foam, Mattress Double Bed, Foam Mattress, 6-Inch Bed Mattress, King Size Mattress (72x72x6_7 Pressure Zone Foam)

Wakefit Mattress | 10 Years Warranty | ErgoTech EcoLatex Classic Mattress, Mattress Double Bed, Natural Latex Mattress, 8-Inch Bed Mattress, Mattress King Size (72x72x8 Inches, Firm, 7-Zone)

The Sleep Company SmartGRID Ortho 6 Inch Mattress King Size | AIHA Certified Medium Firm Orthopedic Mattress for Back Pain Relief | Patented Japanese SmartGRID Technology | 72x72 | 10 Years Warranty

SleepyCat Latex Mattress | 10 Years Warranty | Firm, Orthopedic 6-inch Hybrid Mattress with Pinhole Tech Latex & Memory Foam Layers | 5-Zone Support and Bamboo Cover (King Size, 72x72x6inches)

Centuary Mattresses Sleepables 6-Inch King Size Dual Comfort Hard and Soft Reversible Roll Pack High Resilience (HR) Foam Mattress (78x72x6)

duroflex LiveIn Duropedic - Doctor Recommended Orthopaedic, Pressure Relieving, Memory Foam, Roll Pack, 6 Inch King Size Medium Firm Mattress with Luxury Anti Microbial Fabric (78 X 72 X 6 Inches)

SleepyCat Original Ortho Mattress with AirGen™ Memory Foam | Medium Firm Feel for Balanced Comfort | 8 Inch |SoftTouch Bamboo Zipper Cover | 10 Years Warranty (King Size,78x72x8 Inch)

The Sleep Company SmartGRID Orthopedic Pro - Doctor Recommended | Pressure Relieving | Scientifically Proven 5 Zone Support | 8 Inch King Size AIHA Certified Firm Mattress for back pain | 78x72