Is this jacket warm enough for winter?

No. It has no padding or lining, so it works as a light layer in spring, fall or indoors. In cold weather you would wear it under a heavier coat.

Does it run true to size?

It is a regular cut with regular sleeves, so most shoppers should take their usual size. If you want room to layer a hoodie underneath, consider sizing up.

Is polyester a good material for a casual jacket?

It is durable, wrinkle-resistant and quick to dry, which suits travel and everyday wear. The trade-off is that it breathes less than cotton and can feel clammy when you sweat.

Does it have a hood or pockets?

The listed design is a basic zip-up with regular sleeves and no padding. It is not described as having a hood, so treat it as a simple layering piece.