I use a similar device to cool my duty Kevlar vest in hot summer months. It attaches to the dash duct of my vehicle and sends cold air between me and my vest. Makes a huge difference cooling your core temp.Received my Barrel Cool today. Very nicely put together. Tiny little high intensity motor/blower pushes just enough air to do the job. Got me to thinking - why not rig a hose and blow cool(er) air into my shooting jacket when it isn't in the chamber! Would certainly not hurt in SW ranges in summer! Or anywhere east of the Rockies in summer for that matter!