The Hibearnation Vest has an insulation factor of 240. It restores 4.4 Sanity/min and reduces the rate at which the player loses Hunger by 25% when equipped. A Sewing Kit can be used to repair 71% of its Durability.
The Hibearnation Vest is a tier 3 warm clothing, increasing the amount of time that a character can stay in the cold before Freezing during Winter. Characters that lose Hunger at a normal rate of 75/day will, instead, lose Hunger at a rate of 56.3/day. Wolfgang's normal form will lose 84.4/day while his mighty form will lose 168.8/day, and Wes will lose 70.3/day.
- Wearing the Hibearnation Vest will mostly negate the Sanity loss during Dusk or Night, and while in the Caves or Ruins. While equipped the sanity loss from darkness is -0.6/min, a value the game considers too small to show a sanity loss indicator. This, combined with the delay of hunger loss and insulation factor, makes the vest highly useful when exploring the Caves and Ruins in Autumn or Winter.
- The Hibearnation Vest is the second best Sanity restoring item in the game, the best one being the Tam o' Shanter and, in the Shipwrecked DLC, the Shark Tooth Crown. It's also the best sanity restoring item for the chest slot.
- "Hibearnation" is a play on the words "Hibernation" and "Bear".