The Warmth Preserver is a community-contributed cosmetic item for the Heavy. It turns the Heavy's default vest into a padded vest with a collar and a zipper. The vest's shoulder part and collar are team-colored while the lower portions are dark and the zipper is white. The vest's back part is the unchanged one of the Heavy's default vest.
- The Warmth Preserver was added to the game.
- [Undocumented] Added Strange quality.
- Prior to being confirmed into the game, the Warmth Preserver's team-colored parts were dull-green and paintable, as shown in the item's Steam Workshop thumbnail.
- The Warmth Preserver, the Trash Man, the Leftover Trap and the Rat Stompers were contributed together as the "The Lord Of The Rats" item set for the Heavy.