Designed for freedom and movement, the Mirra office chair is for people whose work style doesn't leave much room for sitting still. The intuitive adjustments and dynamic materials support a range of bodies, making this flexible office chair the perfect seat to share with coworkers and family. Mirra 2 comes with two back options to further fine-tune your fit: The ultra-responsive Butterfly Back for a dynamic suspension membrane and the durable, easy-to-clean TriFlex back.