A 2017 study of 75 subjects with multiple sclerosis found that use of a cooling suit reduced the severity of fatigue, "thus significantly improving their level of independence in activities of daily living."
Full text in J Clinical Nursing https://onlinelibrary.wiley.com/doi/full/10.1111/jocn.13788. Also, a smaller 2001 study in Issues and Innovations in Nursing Practice is available free online. Same findings. https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2648.2002.02129.x