I see jackets for around $200 with heaters in them , using a portable battery pack. Anybody use them while snowmobiling? Are they effective? Here is one by dewalt for $200.
https://www.fleetfarm.com/detail/de...MIs5enkLjw5gIVSdbACh1TygNOEAQYAyABEgJC6fD_BwE
https://www.fleetfarm.com/detail/de...MIs5enkLjw5gIVSdbACh1TygNOEAQYAyABEgJC6fD_BwE