Compact unit with no wiring or electronics. The heat source for this innovative design uses removable and reusable mini-gel packs warmed for a few seconds in a microwave (or you can substitute disposable glove/boot warming packs). This means there are no heavy battery packs, no shorted wires or electronics that may fail over time. The holster or quiver carrying style allows you to easily buckle this gun warmer around your waist or sling it over your shoulder. The warming pack options allows use of the warmer in areas with no power source. There are also pockets within the warmer for storing and warming the popular adhesive-backed heat detection sheets (which are recommended to be heated before application on a cow’s tailhead). Without wiring or electronic parts, this gun warmer is readily washable when necessary. Heavy insulated weave material with reinforced seams.