Cooling clothes especially cooling vest are being considered for as an efficient way to reduce heat strain under hot environment. But wearing ice gel or ice-based cooling vest caused discomfort to subjects due to the weight of vest. Therefore, this study was executed to find efficient cooling parts and to reduce vest weight by cooling only these parts. Two male subjects were exposed to heat(40$^{circ}C$, 30%RH) with A type(breast+back+abdomen+waist), B type(breast+back+waist), C type(breast+back+abdomen) and D type(breast+back) cooling vest that distinguished with cooling part. The results were as follows; When subjects were C type and D type vest, sweat volume was less and skin temperature was low. Heart rate and rectal temperature were low in B type and D type. These results suggest that excessive cooling of breast and abdomen may exert a bad influence to health and cooling of back is desirable.