Full and thick, soft and comfortable, breathable and dry, rebound without deformation, moderate hardness, instant rebound, stable support. The cushion is a “concave” cushion according to the curvature of the human buttocks, matched with high elastic sponge, comfortable and breathable, and not tired after sitting for a long time! texture, good color, water resistance, high gloss and abrasion resistance. The ridge-shaped bionic backrest is similar in shape to the human spine and fits closely to help release the pressure on the spine. adjustable back tightness, can lean back 45° freely. The skin-friendly arm support, the flexible curve fits closely with the arm, non-slip and durable support the arm, and comfortably supports the arm.