Abstract: A barrel cooler comprising a cylindrical, open ended, insulated cloth sleeve or jacket that slips over a beer keg or the like to keep the barrel cold. The insulated cloth sleeve is fabricated from a single piece of fabric by folding the fabric in thirds longitudinally with the insulation layer therebetween and then stitching the bottom circumferentially. A plurality of vertically stitched seams displaced equal distance around the sleeve create internal pockets in which are placed plastic bags of frozen water or the like to cool the barrel.