Link to the manufacturer's website:
https://lavsit.ru/product/adam-sofa/ 

A low-slung sofa with a deep seat in a contemporary design.

Design:
Complex frame made of high-strength birch plywood. Polyurethane foam of varying density, synthetic padding, holofiber, elastic rubber-fabric belts. Removable headrests made of sheet metal, upholstered with foam rubber and fabric. They are fixed between the seat and the backrest and provide comfortable lumbar support.