SICHY AGE Office Chair Its composition consists of aluminum alloy and environmentally friendly high temperature resistant material, which features skin-friendly mesh backrest, high resilience sponge seat, adjustable headrest, flip-up armrests and so on. The backrest and headrest are made of breathable, high-quality mesh to ensure airflow is always cool and comfortable. Premium comfort sponges cushions provide evenly distributed support to ensure a comfortable experience, plus its dual lumbar support helps reduce back strain and muscle fatigue. The ergonomically designed back of the office chair has a frame that conforms to your body and soothes your sitting posture, and the seat cushion and pillow height can be adjusted to suit your needs. The office chair has a maximum tilt of 135°, with flip-up armrests and silent rolling casters to help you find the most comfortable sitting position. The entire base is made of high-strength metal, the strength and durability of this chair