A novel design of a phase change material (PCM) helmet is reported where a PCM-polyurethane foam fabric is used. The fabric, comprising 37% of paraffinic PCM with melting temperature at 35°C, is lined on the interior walls of a motorcycle helmet directly in contact with the head. The experimental tests on the performance of the PCM helmet to cool the head are carried out in a wind tunnel at different speeds of air flow over the helmet. A heating mat is used to simulate the heat generation of the head. Results show that air flow has insignificant effects to the helmet cooling, whereas the heat generation rate has a large impact on the cooling performance. The helmet is also tested with different number of PCM fabric layers. The PCM fabric can be retro-fitted to existing helmets.
 Liu, B.C., Ivers, R., Norton, R., Boufous, S., Blows, S., Lo, S.K. Helmets for preventing injury in motorcycle riders (2008) Cochrane Database of Systematic Reviews, (1), art. no. CD004333. http://www.mrw.interscience.wiley.com.ezproxy3.lhl.uab.edu/cochrane/clsysrev/articles/CD004333/pdf_fs.html doi: 10.1002/14651858.CD004333.pub3
 Yu, W.-Y., Chen, C.-Y., Chiu, W.-T., Lin, M.-R. Effectiveness of different types of motorcycle helmets and effects of their improper use on head injuries (2011) International Journal of Epidemiology, 40 (3), art. no. dyr040, pp. 794-803. doi: 10.1093/ije/dyr040
 Clark, R.P., Toy, N. Natural convection around the human head. (1975) The Journal of Physiology, 244 (2), pp. 283-293. doi: 10.1113/jphysiol.1975.sp010797
 Buist, R.J., Streitwieser, G.D. The thermoelectrically cooled helmet (1988) Paper Presented at the Proceedings of the Seventeenth International Thermoelectric Conference, pp. 88-94. Arlington, Texas
 Jwo, C.S., Chien, C.C. (2007) Solar Powered-operated Cooling Helmet. U.S. Patent 200701376845A1
 Abhat, A. Low temperature latent heat thermal energy storage: Heat storage materials (1983) Solar Energy, 30 (4), pp. 313-332. doi: 10.1016/0038-092X(83)90186-X
 Cabeza, L.F., Mehling, H., Hiebler, S., Ziegler, F. Heat transfer enhancement in water when used as PCM in thermal energy storage (2002) Applied Thermal Engineering, 22 (10), pp. 1141-1151. doi: 10.1016/S1359-4311(02)00035-2
 Tan, F.L., Fok, S.C. Cooling of helmet with phase change material (2006) Applied Thermal Engineering, 26 (17-18), pp. 2067-2072. doi: 10.1016/j.applthermaleng.2006.04.022
 Fok, S.C., Tan, F.L., Sua, C.C. Experimental investigations on the cooling of a motorcycle helmet with phase change material (2011) Thermal Science, 15 (3), pp. 807-816. http://thermalscience.vinca.rs.ezproxy3.lhl.uab.edu/pdfs/papers-2011/TSCI100627027F.pdf doi: 10.2298/TSCI100627027F
 Mondal, S. Phase change materials for smart textiles - An overview (2008) Applied Thermal Engineering, 28 (11-12), pp. 1536-1550. doi: 10.1016/j.applthermaleng.2007.08.009
 Nelson, G. Microencapsulation in textile finishing (2001) Review of Progress in Coloration and Related Topics, 32, pp. 57-64.
 Pause, B. (2000) Melliand Textilberichte/International Textile Reports, 81 (9), pp. 753-754.
 Bendkowska, W., Tysiak, J., Grabowski, L., Blejzyk, A. Determining temperature regulating factor for apparel fabrics containing phase change material (2005) International Journal of Clothing Science and Technology, 17 (3-4), pp. 209-214. doi: 10.1108/09556220510590902
 (2004) ASTM D7024-04 Standard Test Method for Steady State and Dynamic Thermal Performance of Textile Materials. American Society for Testing and Materials. West Conshohocken, PA: ASTM Int