Designed for freedom and movement, the Mirra 2 Stool 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 counter-height office stool the perfect seat to share with coworkers and family. Mirra 2 Stool 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. Eco-Friendly Description: Indoor Advantage Gold certification is SCS Global Services' highest level of indoor air quality performance for furniture. The certification ensures that furniture products support a healthy indoor environment by meeting strict chemical emission limits for volatile organic compounds (VOCs).