About this item 【ERGONOMIC DESIGN】-Curved backrest with fixed lumbar supports perfectly fits the human body and supports the spine’s natural curve. The seat height can be adjusted from 13.8’’ to 17.7’’ for customized comfort during long periods of working or studying. 【BREATHABLE MESH BACK & SEAT】-The back and seat of the computer chair are wrapped with breathable mesh to allow air, body heat, and moisture to freely pass through, helping you maintain a comfortable temperature. Premium nylon mesh has excellent elasticity and wear resistance and will not deform after years of use. 【ROBUST CHAIR CONSTRUCTION】-This office chair is constructed of hard-wearing nylon mesh, high-density foam, durable star base, solid rolling casters and SGS-certified gas cylinder. It has passed BIFMA X5.1 Test and is recommended for office use for customers under 200lbs. 【360° SMOOTH MOBILITY】-This ergonomic office chair is equipped with nylon swivel casters to make sure users can move with the chair effortlessly with a 360 degrees rotation. Durable materials of these five casters allow smooth and steady mobility. 【QUICK-TO-ASSEMBLE】-To make your installation easy as possible, we’ve included illustrated instructions, necessary tools and fittings in the package for convenience. Will usually take 15 minutes for an adult to put it together.