Embodiments of the invention relate to a pneumatic mat (200) comprising a first pneumatic bladder (210), a second pneumatic bladder (220), and a channel (230) connecting the first pneumatic bladder (210) and the second pneumatic bladder (220). The shape of...

The vehicle seat (1) has a seat portion (5) with a backrest portion (6) fitted with vertical main spring (40) including spiral spring elements (41,42). A seat frame device (10) has a fixedly arranged frame portion (12), by which vehicle chassis is fastened...