Homycasa Tall and Big Mesh Back Ergonomic Office Chair Executive Desk Chair, Purple Ergonomic office chair with Mesh back and seat for breathability. Pneumatic seat-height adjustment; 360-degree smooth-rolling casters. Padded seat and back for all-day comfort and support. 330 LBS maximum weight capacity; assembly instructions included. Strong 5 castor-wheel Nylon base lead 360 Degree Swivel.