SIHOO’s Doro C300 has the key features I look for in an ergonomic chair, including a self-adaptive lumbar system.

source https://www.techradar.com/pro/ive-found-the-perfect-new-ergonomic-chair-for-your-office-sihoo-doro-c300-provides-all-day-comfort-and-its-usd300-right-now