Abstract: A sauna includes an upright wall, a base, and a top; the upright wall includes posts each having two lengthways extending grooves, and cavities; the wall has transverse rods, which have tenons fitted into the cavities of the posts, and which have grooves; the wall has panels, which are fitted in the grooves of the posts and the transverse rods at edges; the base and the top are joined to lower and upper ends of the wall, and each include a frame having one inward circumferential groove, and cavities; panels are fitted in the grooves of the frames at edges, and supported with longitudinal and transverse rods, which have tenons fitted in the cavities of the frames; the longitudinal and the transverse rods have spaced gaps; the longitudinal rods are fitted in the gaps of the transverse rods; the transverse rods are fitted in the gaps of the longitudinal rods.

Abstract: A chair includes two lateral supports, a seat connected to the lateral supports, a back, a footrest, and two pivotal bars; the seat has a loop-shape; the back is passed through the seat, and pivoted to rear upper portions of the lateral supports at a middle portion thereof; the back has several back supporting bands connected to the seat so as to be under a space within the seat; the footrest is pivotally connected to a lower end of the back at a rear end thereof; the pivotal bars are pivoted to respective ones of front portions of the lateral supports at upper ends thereof, and they are pivotally connected to a middle portion of the footrest at lower ends thereof; thus, a sitter can change the position of the back and the footrest by means of changing his/her body position.

Abstract: A chair includes two lateral supports, a seat connected to the lateral supports, a back, a footrest, and two pivotal bars; the seat has a loop-shape; the back is passed through the seat, and pivoted to rear upper portions of the lateral supports at a middle portion thereof; the back has several back supporting bands connected to the seat so as to be under a space within the seat; the footrest is pivotally connected to a lower end of the back at a rear end thereof; the pivotal bars are pivoted to respective ones of front portions of the lateral supports at upper ends thereof, and they are pivotally connected to a middle portion of the footrest at lower ends thereof; thus, a sitter can change the position of the back and the footrest by means of changing his/her body position.