The combination of wrapped backrest, headrest, lumbar pillow, fits the player's body curve, effectively relieves back pressure, and makes the player more focused on the game. 2D heightened gaming armrest, flexible and adaptable. Iron Frame: 1.2mm Thickness Material: Normal Sponge (back) + Shaping Sponge (seat) PVC Leather, Nylon Feet Armrest: 2D Lift Armrest Angle Adjuster/Back Lever: 166 Adjuster Gas Rod: Level 3 Chassis: 19#Mechanism N.W.: 18kg-20.5kg