– 26 beech slats, class E1 – 6 double slats in the lumbar area equipped with sliders for adjusting the rigidity based on the body weight – Independently flexing anti-squeak supports for superior adaptability to different body shapes – Steel frame 50×30 mm painted with non-toxic epoxy powders – 4 corner plates to fix the legs, using two screws, for greater stability – 4 legs diameter 50/60 mm with plastic support foot