An apparatus for manufacturing multi-piece closed-back isolation garments, the apparatus comprising: a die unit configured to cut neck openings in a continuous shoulder web having a first edge and a second edge opposite the first edge; the apparatus characterized in further comprising: a first adhesive applicator configured to apply a plurality of first adhesive strips on the continuous shoulder web adjacent to the first edge of the continuous shoulder web; a transfer unit configured to transfer torso web pieces having a substantially tubular shape onto each first adhesive strip such that a first edge of the torso web piece is overlapping the first edge of the continuous shoulder web; a second adhesive applicator configured to apply a plurality of second adhesive strips on each torso web piece adjacent to the first edge of each torso web piece; a first folding unit configured to fold the continuous shoulder web such that the second edge of the continuous shoulder web overlaps each second adhesive strip to form first shoulder web panels and second shoulder web panels overlapping each other in the continuous shoulder web; and a bonding unit configured to create underarm seams between first shoulder web panels and second shoulder web panels overlapping each other in the continuous shoulder web to form shoulder web pieces. a die unit configured to cut neck openings in a continuous shoulder web having a first edge and a second edge opposite the first edge; the apparatus characterized in further comprising: a first adhesive applicator configured to apply a plurality of first adhesive strips on the continuous shoulder web adjacent to the first edge of the continuous shoulder web; a transfer unit configured to transfer torso web pieces having a substantially tubular shape onto each first adhesive strip such that a first edge of the torso web piece is overlapping the first edge of the continuous shoulder web; a second adhesive applicator configured to apply a plurality of second adhesive strips on each torso web piece adjacent to the first edge of each torso web piece; a first folding unit configured to fold the continuous shoulder web such that the second edge of the continuous shoulder web overlaps each second adhesive strip to form first shoulder web panels and second shoulder web panels overlapping each other in the continuous shoulder web; and a bonding unit configured to create underarm seams between first shoulder web panels and second shoulder web panels overlapping each other in the continuous shoulder web to form shoulder web pieces. a first adhesive applicator configured to apply a plurality of first adhesive strips on the continuous shoulder web adjacent to the first edge of the continuous shoulder web; a transfer unit configured to transfer torso web pieces having a substantially tubular shape onto each first adhesive strip such that a first edge of the torso web piece is overlapping the first edge of the continuous shoulder web; a second adhesive applicator configured to apply a plurality of second adhesive strips on each torso web piece adjacent to the first edge of each torso web piece; a first folding unit configured to fold the continuous shoulder web such that the second edge of the continuous shoulder web overlaps each second adhesive strip to form first shoulder web panels and second shoulder web panels overlapping each other in the continuous shoulder web; and a bonding unit configured to create underarm seams between first shoulder web panels and second shoulder web panels overlapping each other in the continuous shoulder web to form shoulder web pieces.