The 9000 Series stool assists your back muscles by maintaining your spine's normal, natural position. It's designed to take pressure off the lower back and thigh region. Our 9000 Series stools offer thick, plush upholstery with a deeper, cut out seat and full size backrest. PRODUCT BENEFITS Full sized, contoured 18" x 15" backrest for better support and posture Contoured 18" x 18" saddle-style seat provides correct weight distribution, pelvic tilt, and posture perfect comfort Waterfall edges eliminate pinching and improves circulation of the thighs and knees; while allowing you to get closer to the patient