Frame made of solid poplar wood with beech inserts and reinforcements, seat with steel springs with inverted tapering sewn by hand onto jutah straps and supported by elastic straps. Water foam water-based padding that is completely hypoallergenic and non-toxic, seat and back cushions made of 3-rigidity Polylatex covered in Dacron and mite-proof cotton fibres. Fabric version comes with removable cover.