Activities requiring high levels of concentration such as for example the fine adjustment of machine parts in industrial manufacturing areas are often carried out in a fixed seated posture for hours on end. The extremely unbalanced loads often cause health problems ranging from muscular tension and headaches to the dreaded slipped disc. Solid chairs with special features that encourage dynamic sitting, help solve this problem. The counter swivel chair features a backrest that follows the user, ensuring the correct seated posture, and can be locked in infinite positions. Due to the properties of polyurethane, it can be easily cleaned, making the stool ideally suited for use in areas with liquids.