Compare 12 King Hybrid: Surprising Luxury, 365-Tested Support We lately discovered the 12" King Mattress, a Luxury Hybrid Gel Memory Foam, and were struck by its understated elegance. The interplay of memory foam and supportive coils cradles the body effortlessly, while the gel infusion keeps our temperature regulated. At first, we underestimated its plushness—it feels far grander than its 12-inch height suggests. The premium pressure-relieving layers have already eased our chronic back pain, and the Forever Warranty offers peace of mind unmatched by many competitors. The 365 Night Trial allowed us to put it to the test; now, we can’t imagine sleeping anywhere else. Ours is a rare balance of sinking comfort and unyielding support, certified by CertiPUR-US for safety.