Any battery powered device is subject matter to fail. It's possible you spill your drinking water bottle around the battery pack; probably it dies. Perhaps a squirrel chews in the wire. You under no circumstances know what can come about and also a heated vest just isn't an justification to improperly layer. In case you’re bringing a heated vest

Most of the heated vests we examined feature an outer nylon shell, which is an effective selection for dampness resistance when wearing the vest being an outer layer. Others ended up thinner and less drinking water-resistant but meant to be paired having an overcoat, so they'd be shielded from acquiring soaked.That is preferable in the event you’