Herman Miller Classic Aeron Task Chair: Tilt Limiter w/Seat Angle Adj - Lumbar Pad - Fully Adj Leather Arms - Standard Carpet Casters Herman Miller's patented Kinemat tilt mechanism lets your neck, shoulders, hips, knees, and ankles pivot naturally. Unique breathable Pellicle suspension dissipates the body heat that builds up while you work, keeping you cool and comfortable, while providing unparralleled support The "waterfall" front edge of the seat takes the pressure off your thighs, so your blood keeps circulating, keeping you alert and focused Offers superior comfort, body support and style in a design that redefines the very meaning of work chair. 12-year Herman Miller warranty with Official Born-On-Date sticker.