To stay cool at all time especially this summer, Thanko - okyo-based USB gadget maker - has released its"USB Necktie Cooler 3". They had USB Necktie Cooler 3 released back in June 2008.
It’s basically a silk necktie with a plastic fan built into the tie’s knot. Just plug the thing into a USB port (the cable is 135cm long) and use the switch to turn the fan on and feel cooler instantly. If you want to use the tie on the go, get the optional battery pack holding four AAA batteries.
As we can see it only cool the front neck, maybe the next version should have another fan at the back of your neck and on the bottom tip of the tie and of course they will call it USB Necktie Cooler 4. Let's wait.