The E-Blue Cobra-R model EEC307 is designed wuth spacecraft outline and 3D ergonomic, provides max comfort and coolest feelings by breathable nylon. It has high grade PU leather and fabric with great comfort and high breathability perforamnce. You won't sweat and overheat, even you stay longer over days & nights. A high resilence foam pad is used in the seat cushion to ensure that the chair doesn't deform and effectively prevents fatigue. The ergo armrest is designed with exteneded structure for great arm comfort, made with PP & 30% glass fiber for durability. The seat height can be moved up and down freely, which pefectly supports your body to stay in most suitable height. It has a one piece five star base is injected with nylon and 30% glass fiber for durability and stability. The casters are made with nylon PA66 and 300F wrappd with PU to effectively reduce noise when moved and durability. The unique cobra logo with exquisite hot stamping process for durability without fading problem.Specifications: Seat surface: High grade PU leather and fabric Seat cushion: High resilience foam pad Gas spring: Class 4, TUV certificated Base: Nlyon & 30% glass fiber Casters: Nylon & PU casters