Sihoo M57 ergonomic mesh office chair at €199.99 at Boulanger (was €299)

On September 24, 2026 (evening, America/Chicago), a live Boulanger check of ref 9000974170 showed the Sihoo M57 ergonomic mesh office chair (black) at €199.99, InStock (schema.org Offer), with on-page discount metadata of €99.01 / 33% versus €299. Generation-NT listed it in Boulanger’s « La Rentrée Gagnante » selection (through Sep 29).

Specs highlight: nylon + mesh, 3D armrests, dynamic lumbar support, recline up to ~135°, waterfall seat edge — a strong work-from-home desk chair pick.

Market: France · Boulanger · EUR.

Source

• Boulanger — Sihoo M57 (9000974170)
• Generation-NT — Boulanger Rentrée promos