Adaptive Lumbar Support System - that conforms to how you sit: Designed to shift according to the weight and angle of your body, the lumbar support’s spring-loaded design provides maximum support for your back as you change from one sitting position to another. Fully Adjustable Lumbar Curve - with customizable protrusion and height settings: With a height knob for up/down adjustments (60 mm) and protrusion knob for front/back adjustments (40 mm), adjust the shape of the chair’s lumbar curve to ensure your spine is supported perfectly. High Density Foam Cushions - for the perfect balance of support and comfort: The chair’s seat base and backrest are padded with dense cushions that hold their form while molding to your unique body shape, providing secure support that feels incredibly plush. Reactive Seat Tilt and Up to 152-degree Recline - for weight-adjusted tilting and flexible seat positioning: Lean back and enjoy seamless support with a backrest that instantly adapts to your weight or set your ideal angle with an adjustable recline of up to 152 degrees. EPU-grade Synthetic Leather - for a comfortable, ultra-durable finish: The Razer Iskur V2 is wrapped in a superior material that not only feels softer than regular synthetic leather but is also more durable and resistant to peeling and cracking.