Is this an official Wu-Tang Clan shirt?

It is sold as Wu-Tang Forever The Final Chamber merchandise with the group's artwork across the shirt. Check the label and tags on arrival if authenticity matters to you.

What does all-over print mean here?

The design runs across the whole shirt rather than sitting in one chest graphic. Expect the Wu-Tang Forever artwork to wrap around the body and sleeves.

It is listed as unisex, so it follows a standard straight cut rather than a women's fit. Size up if you want a looser, streetwear-style drape.

How should I wash a printed shirt like this?

Turn it inside out and wash cold, then hang or tumble low. High heat is what fades and cracks all-over prints over time.

Is it worth it over a plain Wu-Tang logo tee?

If you want a collectible, full-graphic piece tied to the Final Chamber project, yes. If you want a subtle everyday shirt, a single-logo tee is the easier wear.