Back Type : High Back Back Upholstery : Perforated Mesh Headrest : 6 Way Adjustable Headrest( Up/Down, Front/ Back, In/Out) Armrest : 3D Adjustable Armrest Functionality : 6 Way Adjustable Up/Down, Front/Back, In/Out Seat Cushion : 40 Density Foam Seat Fabric : Perforated Sponge Mesh Lumbar Support : 4 Way Adjustable Mechanism : Multi Lock Tilt Mechanism Tilt Type : Swivel Tilt (90 -145 ) Mechanism Lock Type : Multiple Angle Locking (90 -145 ) Gaslift : BIFMA Certified Gaslift Base : Solid Steel Base (1200 KG Tested) Wheel : Nylon Alloy Special Feature 1 : Deep Seat For Under Thigh Support Ideal User's Height Reference : 5'4"-6'0" Ideal User's Weight Reference : 50-100kg