Hi Sunniflutterby,

I too dread the heat during the summers.  Truly messes with my legs and mental capacity.  The Multiple Sclerosis Association of America has a Cooling Equipment Distribution program for patients who quality.  I received my cooling vest through this program.

The vest I chose is one which uses frozen gel inserts in pockets of the vest to keep cool.  I've got the poncho style which can be seen on this page.  It certainly does help to keep your core body temperature cooler. 

Sometimes I've gone to grabbing a few of the gel packs from the freezer and simply holding them against spots on the body for a cooling effect.  Holding cold against the inside of the wrists, back of the neck and upper back, top of the head, as well as around the torso are very effective in achieving a quick response.

The vest I have is not exactly stylish as it has more of a flack jacket look.  But it has allowed me to stay outside with family to enjoy the sun and a little yardwork.