"1) New design ergonomic mesh office chair (Full chair passed BIFMA standard, with SGS test report) 2) Mesh back + 2D lumbar support & nylon back frame & 2D headrest 3) Seat with high density sponge with mesh fabric uphostery 4) Height adjustable armrest with soft PU armpad 5) BIFMA passed CLASS 3 gaslift 6) Muti-functional mechanism with seat sliding & back reclining and locoking at 3 positions functions 7) BIFMA passed 340mm nylon five star base & 60mm BIFMA passed PU nylon castors"