Has anyone tried one of these?

http://shop.coolshirt.com/p/pc-vest-...-cooling?pp=12


I literally have no room on the passenger side for one of the standard Cool Shirt type coolers. Can you put these in the trunk and run long hoses? They do have a 12 qt round one but I'm not sure even that will fit let alone figure a way to secure it........ especially since it will be close to $400 with hoses and shirt..... And you need to tie into a power source? Do they come with an on/off switch?

How is the core cooling systems compared to a helmet blower?

Thoughts, advice and experiences are much appreciated.