Giantex Gaming Chair Ergonomic Racing Style Chair High Back Executive Office Chair PU Leather Height Adjustable Computer Swivel Desk Chair with Headrest, Lumbar Support and Reclining Back (Green) [Ergonomic and Adjustable Back] - The chair back is padded with high density PU sponge, being of high resilience, and based on the ergonomic theory. The back is also high enough. Moreover, the adjustable extent of the back leaning is 90 degrees. To adjust the back leaning angle, you need to press the latch on the outside of the seat and push the back forward or backward at the same time. The maximum adjustment of the back makes the gaming chair a small bed.