On the manufacturer's website: https://lavsit.ru/product/single-bed-many/ 

A single bed with a lush upholstered headboard and sides

Construction
The frame of the headboard and the sleeping place is made of birch plywood of the FC brand. Reinforced fastening strapping on the bolted connection. Polyurethane foam of various densities, sintepon, periothek. Hidden solid oak supports, wenge tinting.