Chair NRA from Delo Design. In four versions: the usual chair with a hard and soft seat, a bar stool with a hard and soft seat. In the file, in the materials window, there are maps with all the color options for the frame and the seat.

Links to the manufacturer's website / store:
Chair: https://www.delo-design.com/nra 
Chair with a soft seat: https://www.delo-design.com/nrasoft 
Bar stool: https://www.delo-design.com/nrabar 
Bar stool with a soft seat: https://www.delo-design.com/nrabarsoft 

TurboSmooth modifier is applied on the soft seat, the modifier is not folded. For all models, a UVW Unwrap is performed. The welding seams on the frame are made using a bump map.