I put together a simple PVC reservoir and a couple pumps, as well as a small microcontroller board for some rudimentary temperature control. That and a fancy new backpacking frame and we’re ready to rock! Oh, final weight? About 22lb. Yeah- this will definitely not work in the long term. As far as performance goes, it’s very good at keeping you as cool as you want to be, assuming you are properly insulated from the outside weather. Since this unit is for cosplaying, that should be no trouble, since costumes that necessitate cooling are thoroughly insulating. Battery life is about 3-4 hours.
