The high backrest measures 69 CM27.1 inches, providing support when tilting the head backwards. An adjustable headrest that can make the neck more relaxed. The lumbar pillow providing strong support for the waist. Allow you to work easily.The sitting height of this computer desk chair can be adjusted freely between 45-53 CM17.7-20.8 inches, and the backrest angle can be fixed between 90 -140 . You can find the most suitable height and angle for yourself. Features: The high backrest measures 69 CM27.1 inches, providing support when tilting the head backwards. An adjustable headrest that can make the neck more relaxed. The lumbar pillow providing strong support for the waist. Allow you to work easily.The sitting height of this computer desk chair can be adjusted freely between 45-53 CM17.7-20.8 inches, and the backrest angle can be fixed between 90 -140 . You can find the most suitable height and angle for yourself Durable and Comfortable Support up to 600 pounds 360 rotating silent nylo