The present invention features a helmet 100 for cooling a head of a person. In some embodiments, the helmet comprises a top portion 110 covering the scalp region of the person's head, a neck portion 120 covering the neck region of the person's head, a tube 130 embedded in the helmet 100, wherein a circular portion 132 of the tube is disposed in the top portion to lay over the person's scalp region and a tail portion 134 of the tube runs down the neck region 120. Further, a first end of the tail portion 136 of the tube fluidly connects to the circular portion of the tube, and a second end of the tail portion 138 of the tube comprises a cap 140 that can open for drainage of a content in the tube. In some embodiments, a pressurized refrigerant container 150 fluidly connects to the tail portion 134 of the tube, wherein a pressurized refrigerant can be released into the tube when a first valve is opened.