The Trenchcoat is the second Lab Coat upgrade. It will allow Trace to teleport through walls that are 2-blocks thick and can be used while jumping in mid-air. It also allows teleporting through roof or floor tiles, as well as teleporting in diagonal directions. It has the same damage resistance properties as the Modified Lab Coat; Trace takes 40% of the damage he would without a coat on.
The Trenchcoat can be found in the middle-right portion of Ukkin-Na. After entering Ukkin-Na for the first time, the player will notice that they cannot go back, due to 1-block walls that are above ground-level. Acquiring the Trenchcoat will allow the player to jump and teleport through these walls to once again exit Ukkin-Na.