Steelcase Think Chair, Black Leather Weight-activated mechanism provides support in proportion to your own body weight, while keeping you oriented to your work Back flexors track with the natural movement of your spin and are individually contoured to provide optimum support for each area of the back Arms telescope in and out, move forward and back, pivot and adjust up and down so you can find a natural position that comfortably supports your needs Think chair was conceived, developed and produced for maximum sustainability and is 98% recyclable and can be disassembled in about five minutes Weight tested to support up to 300 pounds with no loss of performance