On Tuesday, February 24th, I accidentally left my leather jacket in Spilker 317 (conference room on south-east side of building, 3rd floor), and it disappeared sometime between 10AM and 4:30PM.

It is an XL brown Emanuel jacket. Defining features are two horizontal zippers on both breasts, front pockets, and zippers on the wrists. I don't have any good pictures of it, so I posted the image from its amazon page.