Engineered Garments natural (off-white) colored engineer jackets are now available at Odin.  The selvege fabric looks like a canvas or boat cloth, not really sure.  I would not agree that it’s as “versatile as a blazer or jacket”, but it’s not bad looking either.

Engineered Garments Engineer Jacket - Natural 1

Engineered Garments Engineer Jacket - Natural 2

Engineered Garments Engineer Jacket - Natural 3

Engineered Garments Engineer Jacket - Natural 4