Herman Miller Mirra Basic Chair - Fixed Arms, no tilt limiter, no seat angle adjustment and fixed lumbar support. Mirra is an innovative blend of passive and active adjustments that provides a new reference point in performance, aesthetics, and value. Mirra automatically shapes itself to each user, while a few simple adjustments fine-tune the fit and feel. The chair's next-generation innovations all work together in a fresh-looking chair that's easy to use. Total Back Support - No adjustment needed. The pliable, elastic TriFlex back supports the entire spine and conforms to size, posture, and movements. Passive PostureFit performance. A camber shape at the base of the back gives healthful, comfortable support to the lower back below the beltline. A Balanced Ride - Easy motion. The Harmonic tilt creates pivot points at the hip, knee, and ankle to allow easy and natural movement. Advanced spring technology. Users of all sizes feel equal resistance while moving anywhere in the wide tilt range; the sitter is always in control. Custom Seat Comfort - AireWeave suspension. This elastomeric suspension seat follows the contours of the body, distributes pressure evenly, and provides aeration. Aesthetic Appeal - Innovative look. Mirra has a clean, light-scaled design that reveals the chair's features and function. Colorful choices. The backrest and seat suspension come in a range of colors that mix or match to complement interiors and other furniture. Earth Friendly Sustainable design. Mirra is made of a minimal number of parts and is easily disassembled for recycling; the recycled content is high, and it's 96 percent recyclable.