SEAT
HR Foam 35 kg covered with 200g fiber

Loose seat cushions, fixed with Velcro to allow mechanism movement.
DIV and Open End part: fixed seat cushions, loose back cushions

BACK
Foam 25 kg covered with 200g-500g fiber

ARMREST
Foam 25-30 kg

FRAME
Plywood + wood

Mattress with Bonnell springs
Memory foam mattress as option