Back Type :High Back Back Material : Nylon (A Grade) Back Upholstery : Original Korean Mesh Headrest : Adjustable(Up/Down, Front/Back Armrest : 2 way Adjustable (Up/Down, Front/Back Seat Cushion : 50 Density PU Molded Cushion Seat Fabric : Sponge Mesh Mechanism : Synchro Mechanism Mechanism Lock Type : Up-right Lock Gaslift : Bifma Lavel 5, Tested up 100000 round Base : solid Steel Base 800 KG Tested) Wheel : Noise-free Nylon Ideal User's Height Reference : 5'2"-6" Ideal User's Weight Reference : 50kg to 100kg Special Feature 1 : 2 way Adjustable Armrest Special Feature 2 : Close Neck Support