S-shape Design Lumbar Support Protects SpineMonhey office chair is designed with lumbar & back support to protect your spine.This desk chair is good for relieving back pain.People with sciatic or low back pain will prefer this computer chair.The lumbar support of study chair is good for the healthy development and growth of adolescent students' spine,which can be adjusted up and down by 1.2 inches. Breathable & ComfortableThe backrest of the mesh office chair is made of breathable mesh fabric.The breathable mesh of the desk chair has strong tensile strength, which can keep the back cool and comfortable and avoid sticky sweat that may accumulate on the back.The cushion made of high-density sponge are soft and breathable,The ergonomic office chair can relieve your fatigue caused by long time sitting. Rocking Function & Lock UprightThis office chair can be tilted by 90°~125°.By adjusting the control handle, you can set the rocking or no rocking of the desk chair as you