Headwear for removing heat from a person's scalp in order to prevent hair loss

Headwear for removing heat from a person's scalp in order to prevent hair loss, which headwear comprises a body portion for fitting over the person's scalp, an inlet for a cold fluid, an outlet for the cold fluid, and fastener means for fastening the headwear on the person's head, the headwear being such that it opens to a flat condition when it is not in use on the person's head, and the body portion comprises a plurality of internal walls which define pouch portions, the pouch portions being connected to one another to define a passageway through the body portion from the inlet to the outlet whereby the cold fluid is able to circulate through the body portion, and the pouch portions being such that they are expanded by the cold fluid and caused in use to press against the person's scalp with a pressure which causes the body portion to be pressed into good contact with the person's scalp and thereby to facilitate maximum cold transfer from the body portion to the person's scalp.