If you are happy to sit without a backrest, then these are the perfect for you! Each seat will want you to sit in the neutral pose. It means that sit and lean back until you feel your pelvic bones touching the seat. Your spine will suport itself above the pelvic bones in a verticl position. All you do is sit in this position. Using a stool will give you many years of active sitting and will truly massage your back into a relaxed holding positition. Each of our swivel stool units is comfortable and affordable and will will keep your body alive with movement. Please read my Therapeutic and Comfortable Articles for further information that includes stools. Free E-book with a Purchase of any chair!