Is this jacket warm enough for winter?

No. It is an unpadded polyester layer, so it works for mild days or as a mid-layer under a coat. For cold weather you need something insulated on top.

What sizes does it come in?

S, M, L, XL, 2XL and 3XL. Check the size chart before ordering, since polyester jackets often run small.

Does it have pockets or a hood?

Neither is listed. The description covers only the zip front, regular length and regular sleeves, so expect a plain jacket.

100% polyester. That makes it light and quick-drying but not very breathable, and it can trap odor.

Can I wear it for workouts?

It works for light activity like walking or warm-ups. It has no padding or support, and polyester traps sweat, so it is not ideal for intense training.