In recent years, the demand for personal cooling devices has been on the rise, especially during the summer months when temperatures can be sweltering. http://L.Iv.Eli.Ne.S.Swxzuu.Feng.Ku.Angn.I.Ub.I.xn--.xn--.U.K37@cgi.members.interq.or.jp/ox/shogo/ONEE/g_book/g_book.cgi