The Senza Ergo seating has been designed to function for heavy duty 24 hour usage in any task or office setting. With its extra high back and adjustable arms, Senza Ergo offers multiple enhanced ergonomic features based on how employees sit and move over the course of a day. The Senza Ergo task chair is a 24 hour use heavy duty version of the popular Senza office seating range, packed full of ergonomic features.