The backrest tilt position can be locked between 90-130 degree to suit your needs for work, relaxation and naps. The seat can be adjusted up or down by 10cm to set the optimum height for you, and the 360 degree swivel function allows you to multitask with ease.Assembly instructions, all parts and necessary tools are included in the package, can be easily completed in 20 minutes. Office chair is ergonomically designed with a stronger wrapping high back, perfectly fit your body shape and provide proper support for your upper and lower back.The surface of the swivel executive chair is made of fabric, premium texture, skin-friendly and wear-resistant, easy care. Heavy duty metal bracket and chair legs enhance the durability of the chair.