It's made of strips of glass-reinforced polystyrene resin that bend more responsively.The membranous weave that stretches across the frame, which Herman Miller calls the pellicle, also got an update. Sayl Chair $545.00 - $875.00. Powered by The chair arrived in less than a week and is absolutely perfect. The best task chairs are like that. Herman Miller calls it the pellicle, and Stumpf and Chadwick essentially invented it in the early ‘90s. View All Office Products Designing a richer experience of home and work since 1905. Over the years it has become a status symbol among the corporate elite.