Model made according to official photos and measurements.

https://mi-house.ru/dlya-doma/mebel/kreslo-kompyuternoe-hbada-ergonomic-double-waisted-waist-computer-chair-hdny163wm-black.html 

Part of the model has a Turbosmooth modifier assigned to it in Render Iterations 3 mode so that mesh smoothing is applied only during the rendering process. Only 1 iteration of turbosmooth is enabled for the viewport for less weight of the model in the viewport.

All materials have convenient names.
There are two models of armchair in the scene with prepared materials in black and white colors.

Model weight without Turbosmooth: 25506 polygons