This is one of the worst things I've bought from Nike, the shape is riciculous. it is not "Loose fit: roomy and relaxed" it is shaped like clown clothing.
I'm normally a medium in Nike shirts, this being "relaxed" I went for a small instead and it still feels like I'm wearing a tent.
There is a reason the model is standing in that pose with his hands behind his back in the video, holding it in shape, otherwise it would look like nursery kid's smock.