Gaming Chair,Ergonomic Computer Gaming Chair,400lb Load-Bearing,Retractable Footrest/Waist Support/Ergonomic Backrest[Spring + 4D Sponge] (Grey)

【Large space ergonomic design】 Enlarged seat designed for adults (22 inches long, 21 inches wide, 51 inches high, adjustable height) Triple support system: adaptive high back headrest + 3D lumbar support + widened arc backrest BIFMA certified military-grade structure, maximum load-bearing 400 pounds.
【Full scene multi-mode adjustment】 90°-155° unlimited tilt + 360° rotating chassis Smart linkage armrest: automatically folds up when lying flat to maintain elbow support Hidden telescopic footrest (extendable to 26 inches), instantly transformed into a nap bed
【Military-grade comfortable sitting feeling】 4D cold foam sponge layer + high elastic spring (density ≥65kg/m³) anti-collapse Racing-grade breathable hollow back panel, 40% more breathable Fully wrapped side wing design effectively disperses hip pressure
【Industrial-grade durable structure】 20mm thickened steel frame, rubber casters passed 100,000 durability tests Silent universal wheels, passed ASTM roller test (1000 miles wear rate
【Worry-free after-sales service guarantee】 Assembly guide (average installation time