Filling Configuration: Seat cushions are a combination of “5cm high-resilience sponge + individual pocketed springs”—sponge density 45D (soft without sagging), springs are “8-coil high-manganese steel” (strong rebound, no deformation after long-term sitting);
Sitting Feel Testing: Sinking slowly 3cm when sitting down (wrapping feel), springs rebound quickly (≤0.5 seconds) when standing up—no “stuck in soft sofa” or “hard sofa discomfort”;
Durability: After 10,000 sitting pressure tests (simulating daily frequent use), the cushion rebound rate remains ≥95%, with less than 10% difference in sitting feel after 3 years.
