Ergonomic Office ChairOur EC100 S-shaped dual-back ergonomic mesh office chair is meticulously designed to provide exceptional lumbar support for maximum comfort. The adaptive back support ensures optimal support in all positions. Latest 360° Even Pressure Technology Spring Cushion to alleviate uneven pressure on the hips. The headrest rotates 60° and adjusts by 2.75 inches. The 2D armrests adjust by 3.5 inches vertically for varying working environments, Those together ensuring a comfortable sitting experience360° Even Pressure Technology Spring CushionThe EC100 ergonomic chair features exclusive patented spring pressure cushion technology. The seat cushion is 30% thicker than standard cushions and incorporates 20 springs for increased softness. The saddle-shaped design effectively disperses pressure on your hips, resulting in a softer, more evenly distributed seating experience, guaranteeing comfort during long periods of sittingAdaptive Lumbar SupportTo provide enhanced lumbar