A series of experiments was performed on studying the dynamic heat and moisture transferring procedure and evaluating heat-moisture comfort properties of functional moisture transported and dry-fast fiber in wearing conditions that produce continued sweat. Experiments were performed in two different environmental conditions, which were the most comfortable condition and an extremely uncomfortable condition for humans. The real time changes of temperature and relative humidity in inner and outer surfaces of different fiber fabrics were measured using self-made textile-microclimate measuring instrument. Then, fabric’s comprehensive heat-moisture comfort properties were obtained. Results show that fine denier polypropylene fiber as a newly moisture transported and dry-fast functional fiber has better heat-moisture comfort properties than other conventional fibers, and it is more suitable for sportswear fabric.