Insulated Suit
The suit you live in. It cuts heat and cold damage by 30% to 90% depending on the ore it's lined with, and holds about 20 minutes.
Which ingot you line it with is the difference between 30% and 90% protection: it reads that ore's Density. The padding can be cloth or leather, so a farmer and a hunter can both make one.
Like the Heat Suit, it only drains while it's protecting you. Twenty minutes is "you live here now" territory.