It’s called the Cholombia shirt because they are produced in Choloma Honduras, one of the most dangerous places on earth.
The Colombia Shirt is the creation of Bone Tactical. They’ve got quite a story behind the shirt, so I won’t steal their thunder, but rather encourage you to hit the link and read it for yourself.
The Hawaiian accents on the MultiCam have me intrigued. Sized from Small – XXLarge like military uniforms, there’s even a short sleeved version.