bumper chair by HermanMiller

With its gentle sweep and excellent lumbar support, comfort is paramount in the Bumper Chair’s deceptively simple, nearly seam-free design. The arm cap and inner and outer shells are shaped from a single piece of upholstery, creating a continuous, uninterrupted welt around the seat. Originally introduced in 1964, the Bumper Chair’s robust portfolio of customization options includes numerous textiles and leather upholsteries, as well as a series of bases, making it the perfect chair for a variety of lounge, living, and work spaces.
https://www.hermanmiller.com/products/seating/office-chairs/bumper-chair/