Is this an official BT21 product?

The listing presents it as a BT21 backpack. BT21 is the character brand made by LINE Friends with BTS, so check the label or tag on arrival if official merchandise matters to you.

The listing gives no dimensions. Treat it as a standard casual daypack and confirm the measurements with the seller before buying if you need to fit a laptop or folders.

Does it have a laptop sleeve?

No compartment details are published. Assume a simple main compartment until the seller confirms otherwise.

Is it good for school?

It suits light daily loads and fans of the characters. Without stated padding or a laptop sleeve, it is a casual carry rather than a study pack.

BT21 and BTS fans, and anyone buying a character backpack as a gift. Shoppers who want padded straps and organizer pockets should compare with a plain everyday backpack.