wood: beech or oak
frame: stained or lacquered massive-wood
backrest: solid wood frame covered by two beech or oak veneered multi-layers
seat: curved multi-ply beech, beech or oak veneered;
oak frame: additional version hpl laminate veneered
terchincal tests: UNI 10977/2002
seat and back fatigue EN 1728/00 level 5° severe
seat and back static EN 1728/00 level 5° severe
crosses static load test EN 1728/00 level 5° severe