A pair of shoes with bellows built into the soles, and air filters to prevent dirt, dogshit and grass clippings making their way in.
Tubing to the waist allows you to pump air into your shirt, to cool you while you walk or as you sit and jiggle your feet up and down.
Of course, this will result in a billowy shirt, much as a pirate would wear.-- UnaBubba, Jan 21 2013 From toes to...Well, not quite all the way to the head... Breezing_20Bra [normzone, Jan 22 2013] It's been horrendously hot here, recently. Working at the Scout den on Saturday morning, it was 41C (106F) by midday. Anything would help.-- UnaBubba, Jan 21 2013 Swap you! I've about had a gutful of days higher than body temperatures.-- UnaBubba, Jan 21 2013 //If it helps, we've been at the other end of the spectrum here in northwestern USA.// That makes this even more useful! It's so cold out here (high of -9F tomorrow) that boots are required (if you prefer your feet attached to your body) but when you go indoors your feet will overheat. A bellows cooling system would be much better than untying and retying.-- DIYMatt, Jan 21 2013 Just realised this would make your shirt look all billowy, such as pirates and swashbucklers would wear.-- UnaBubba, Jan 21 2013 Good'un [+]-- AusCan531, Jan 21 2013 random, halfbakery