1Wearresistant, breathable, soft, comfortable, environmentally friendly and easy cleaning. 2PU leather feels softer, featuring wearresistant, cold resistant, breathable, aging resistant, soft texture, environmental protection and beautiful appearance. 3Rear head load bearing designs, change support point, cervical vertebra have more even forces. 4Mesh cloth is comfortable and breathable, wearresistant and dirtresistant fabrics can be wiped cleaning. 5Simulation hand massage, wonderful and comfortable using experience.