COMPCOOLER Backpack ICE Water Cooling System High Collar Cooling Vest 3.0 L Flow Control

It's cool, it works, and all the while the gentle pulsing of the pumped water is a light massage. The tubing does condensate a little, moistening the vest, and sometimes there can be moisture in the backpack, but both have easy remedies. I would have probably bought the full suit, had I known this works as well as it does, but the high collar vest does mostly what I need. I cannot wear the backpack under a jacket to hide it as I planned, butI think my job will forgive.