Disposable undergarment

A disposable undergarment comprising:

• a liquid-pervious top sheet;
• a liquid-impervious backsheet;
• and
• a liquid-absorbent panel disposed between said topsheet and said backsheet,
• said liquid-absorbent panel comprising:
• a body fluid absorbing/holding layer comprising a mixture of fluff pulp, high absorption polymer particles and heat-sealable resin fibers, said body fluid absorbing/holding layer including an upper and a lower surface and a plurality of depressions formed in at least one of the upper and the lower surface;
• and
• a nonwoven fabric layer comprising heat-sealable synthetic resin fibers,
• said nonwoven fabric layer being placed upon at least one of the upper and lower surface of said body fluid absorbing/holding layer which includes said plurality of depressions, and said absorbing/holding layer and said nonwoven fabric layer being integrally covered with and bonded to a water-pervious sheet,
• said heat-sealable synthetic resin fibers of said absorbing/holding layer being heat-sealed with said nonwoven fabric layer over contacting surfaces of said absorbing/holding layer and said nonwoven fabric layer and further beat-sealed within the plurality of depressions in the adjacent contacting surface of the body fluid absorbing/holding layer so as to substantially fill said plurality of depressions.