Is this shirt official Invincible merchandise?

It is branded Invincible and carries Invincible and Omni-Man artwork. The listing does not state a licensing arrangement, so treat it as fan-oriented graphic apparel.

Solid colors are 100% cotton. Heather colors are 50% cotton and 50% polyester, with Sport Grey at 90% cotton and 10% polyester, and antique colors at 60% cotton and 40% polyester.

How should I wash it?

Machine wash warm at up to 40C or 105F, use non-chlorine bleach if needed, and tumble dry on medium. Do not iron the print and do not dry-clean.

Will the print look exactly like the product images?

Screen settings can shift colors slightly, and the manufacturing process can vary image alignment a little from shirt to shirt. Expect small differences rather than an exact match.

Does it fit true to size?

It has a classic men's fit with a crew neck and short sleeves. The listing notes that stated sizes are approximate and actual measurements may vary slightly.