The bearing structure of STRETCH is made of galvanised and polyester powder coated steel, thickness 60/10. The upper part and the backrest are made of solid exotic wood, thick 40 mm, treated with natural waterproof oils. The backrest is shaped by controlled three-dimensional pantograph, thus obtaining two geometrical figures, 1705x75 mm. The seat is fixed to the bearing structure through hexagonal M8 screws fixed to the wood. Two robust end supports made of steel EN10111DD11, 80/10 thick, are fixed on the back side ensuring the solidity of the backrest. The base of the metal structure is fixed to the ground through four M10 holes and the respective bolts.