SHENZHEN, China, June 18, 2026 (GLOBE NEWSWIRE) -- Sihoo, a global leader in ergonomic seating, today announced that its flagship Doro C300 Pro V2 has officially been certified by the esteemed German Institute for Health and Ergonomics (IGR). Meeting the uncompromising standards of DIN EN ISO 26800, this certification serves as an independent validation of the chair's breakthrough approach to human-centric comfort. Comfort isn't just a feeling. …