“Sit-Stand” backless stool gives support while sitting or standing. Allows worker to stay in upright position while placing weight directly on seat. Ergonomically designed for mobility without putting added pressure on back and lower body of worker. Polyurethane seat has tilt adjustment. Sit-stand stools have pneumatic seat height adjustmen and pneumatic cylinder has a lifetime guarantee. Stools have 360°swivel. The texture on the seat provides a non-slip surface that is puncture-resistant and easy-to-clean.