• Ergonomic design fits your body curved for optimal support• Contours to your back, lumbar and hip to reduce pressure points• Selected materials for enhanced seating comfort• Breathable mesh fabric allows for good airflow to keep you cool• Thick sponge cushion relieves pressure during long-time sitting• Built-in lumbar support helps maintain a proper spine alignment• Height-adjustable rocking swivel chair for an energetic workday• With a rocking tension control and height adjustment for easy operation• 90° flip-up armrests save a lot of space when it needs to tuck under your table• 360° rolling casters ensure easy mobility on various surfaces• Premium gas cylinder and sturdy 5-claw base for added stability• Assembly needed